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ectotongue

animated ectobody ectotongue female_sans femdom licking_penis smug thiccberry
animated ectobody ectotongue female_sans femdom licking_penis smug thiccberry
1boy1girl dialogue ectopenis ectotongue fallen_ghost_angel_(artist) fingering fingering_pussy sans skeleton tongue undertale
1boy1girl dialogue ectopenis ectotongue fallen_ghost_angel_(artist) fingering fingering_pussy sans skeleton tongue undertale
1boy1girl bite dialogue ectopenis ectotongue fallen_ghost_angel_(artist) sans skeleton soul tongue undertale
1boy1girl bite dialogue ectopenis ectotongue fallen_ghost_angel_(artist) sans skeleton soul tongue undertale
2boys blush dialogue ectobutt ectotongue fallen_ghost_angel_(artist) gay gay_sex hands_up holding_hands one_eye_closed penetration sans tongue undertale
2boys blush dialogue ectobutt ectotongue fallen_ghost_angel_(artist) gay gay_sex hands_up holding_hands one_eye_closed penetration sans tongue undertale
1boy 1girls 2d bigger_male blush eating_pussy ectobody ectotongue english_text female human human_female humanoid leaking_precum licking_pussy male mothiepixie narration oc sans sans_au sex size_difference skeleton smaller_female talking text undertale_(series) undertale_au
1boy 1girls 2d bigger_male blush eating_pussy ectobody ectotongue english_text female human human_female humanoid leaking_precum licking_pussy male mothiepixie narration oc sans sans_au sex size_difference skeleton smaller_female talking text undertale_(series) undertale_au
1futa 1girls 2024 2d acidd_grrs barely_clothed big_penis blush breasts clothed clothing duo ectobody ectobreasts ectopenis ectotongue erection female female_sans futa_on_female futanari huge_breasts humanoid humanoid_penis imminent_sex kissing mostly_nude on_back penis sans sans_(underswap) sanscest selfcest skeleton thick_thighs tongue tongue_out underswap_sans undertale undertale_(series)
1futa 1girls 2024 2d acidd_grrs barely_clothed big_penis blush breasts clothed clothing duo ectobody ectobreasts ectopenis ectotongue erection female female_sans futa_on_female futanari huge_breasts humanoid humanoid_penis imminent_sex kissing mostly_nude on_back penis sans sans_(underswap) sanscest selfcest skeleton thick_thighs tongue tongue_out underswap_sans undertale undertale_(series)
2020s 2021 2boys 2d absurd_res animated_skeleton anthro artist_name black_bottomwear black_clothing black_pants blue_blush blue_clothing blue_eye blue_hoodie blue_jacket blue_penis blue_topwear blush blush_lines bodily_fluids bone boots bottomwear brother brothers candy candy_cane christmas christmas_clothing christmas_headwear christmas_sweater christmas_topwear clothed clothing covering_mouth covering_own_mouth dessert digital_media_(artwork) duo ectopenis ectoplasm ectotongue english_text fluids food food_fetish food_insertion food_play footwear ganzooky gay genitals gloves glowing glowing_eye greeting_card hand_on_mouth hat headgear headwear hi_res holidays hooded_jacket hoodie improvised_sex_toy incest jacket male male/male male_only merry_christmas monster object_insertion orange_blush orange_tongue pants papyrus papyrus_(undertale) pattern_bottomwear pattern_clothing pattern_pants penis pink_slippers precum red_boots red_clothing red_footwear red_gloves red_ribbon ribbon ribbon_on_penis sans sans_(undertale) santa_hat sex_toy sibling skeleton slippers snow socks sounding spread_legs striped_bottomwear striped_clothing striped_pants stripes sweater text tongue tongue_out topwear translucent translucent_penis two-tone_background two_tone_background undead undertale undertale_(series) urethral urethral_insertion video_games yaoi
2020s 2021 2boys 2d absurd_res animated_skeleton anthro artist_name black_bottomwear black_clothing black_pants blue_blush blue_clothing blue_eye blue_hoodie blue_jacket blue_penis blue_topwear blush blush_lines bodily_fluids bone boots bottomwear brother brothers candy candy_cane christmas christmas_clothing christmas_headwear christmas_sweater christmas_topwear clothed clothing covering_mouth covering_own_mouth dessert digital_media_(artwork) duo ectopenis ectoplasm ectotongue english_text fluids food food_fetish food_insertion food_play footwear ganzooky gay genitals gloves glowing glowing_eye greeting_card hand_on_mouth hat headgear headwear hi_res holidays hooded_jacket hoodie improvised_sex_toy incest jacket male male/male male_only merry_christmas monster object_insertion orange_blush orange_tongue pants papyrus papyrus_(undertale) pattern_bottomwear pattern_clothing pattern_pants penis pink_slippers precum red_boots red_clothing red_footwear red_gloves red_ribbon ribbon ribbon_on_penis sans sans_(undertale) santa_hat sex_toy sibling skeleton slippers snow socks sounding spread_legs striped_bottomwear striped_clothing striped_pants stripes sweater text tongue tongue_out topwear translucent translucent_penis two-tone_background two_tone_background undead undertale undertale_(series) urethral urethral_insertion video_games yaoi
2d alternate_universe animated_skeleton belly big_penis blush breasts color dialogue dreamtale ectobelly ectobody ectobreasts ectopenis ectotongue english english_dialogue english_text female_sans heart horror_sans horrortale knot male_penetrating neahchanart nightmare_sans_(fan_character) sans sans_au sanscest skeleton small_sub_big_dom tagme tearing_up text tongue_out undertale undertale_(series) undertale_au
2d alternate_universe animated_skeleton belly big_penis blush breasts color dialogue dreamtale ectobelly ectobody ectobreasts ectopenis ectotongue english english_dialogue english_text female_sans heart horror_sans horrortale knot male_penetrating neahchanart nightmare_sans_(fan_character) sans sans_au sanscest skeleton small_sub_big_dom tagme tearing_up text tongue_out undertale undertale_(series) undertale_au
2d alternate_universe animated_skeleton artist_name blush color dialogue ectobody ectopenis ectotongue english english_dialogue english_text error_sans error_sans_(fan_character) errortale french_kiss fresh_sans heart heart-shaped_pupils ink_sans ink_sans_(fan_character) inktale licking_penis male_only multi_tongue multicolored_tongue neahchanart oral penis rainbow_blush rainbow_tongue sans sans_au sanscest skeleton tagme text threesome tongue uncensored undertale undertale_(series) undertale_au
2d alternate_universe animated_skeleton artist_name blush color dialogue ectobody ectopenis ectotongue english english_dialogue english_text error_sans error_sans_(fan_character) errortale french_kiss fresh_sans heart heart-shaped_pupils ink_sans ink_sans_(fan_character) inktale licking_penis male_only multi_tongue multicolored_tongue neahchanart oral penis rainbow_blush rainbow_tongue sans sans_au sanscest skeleton tagme text threesome tongue uncensored undertale undertale_(series) undertale_au
2020s 2022 2boys abosinsin animated_skeleton bad_id bad_twitter_id bite_mark biting bottomless commission commission_art deltarune ectopenis ectotongue fangs gay grabbing_sheets gripping_sheets handjob imp jevil_(deltarune) looking_at_another male male/male male_only penis pillow pillows sans sans_(undertale) skeleton tail text tongue tongue_out topless topless_male twitter_username undead undertale undertale_(series) visible_breath yaoi
2020s 2022 2boys abosinsin animated_skeleton bad_id bad_twitter_id bite_mark biting bottomless commission commission_art deltarune ectopenis ectotongue fangs gay grabbing_sheets gripping_sheets handjob imp jevil_(deltarune) looking_at_another male male/male male_only penis pillow pillows sans sans_(undertale) skeleton tail text tongue tongue_out topless topless_male twitter_username undead undertale undertale_(series) visible_breath yaoi
2020s 2022 2boys abosinsin animated_skeleton bad_id bad_twitter_id bite_mark biting bottomless commission commission_art deltarune ectopenis ectotongue fangs gay grabbing_sheets gripping_sheets handjob imp jevil_(deltarune) looking_at_another male male/male male_only penis pillow pillows sans sans_(undertale) skeleton sketch tail text tongue tongue_out topless topless_male twitter_username undead undertale undertale_(series) visible_breath white_background yaoi
2020s 2022 2boys abosinsin animated_skeleton bad_id bad_twitter_id bite_mark biting bottomless commission commission_art deltarune ectopenis ectotongue fangs gay grabbing_sheets gripping_sheets handjob imp jevil_(deltarune) looking_at_another male male/male male_only penis pillow pillows sans sans_(undertale) skeleton sketch tail text tongue tongue_out topless topless_male twitter_username undead undertale undertale_(series) visible_breath white_background yaoi
2d 2d_(artwork) 2d_artwork alternate_universe animated_skeleton blep blush color ectobody ectobreasts ectopussy ectotongue fan_character female_only female_sans ink_sans ink_sans_(fan_character) inktale khorroux leaking_cum looking_at_viewer sans sans_au skeleton small_breasts sole_female solo star_eyes tagme tongue_out uncensored uncensored_breasts uncensored_vagina undertale undertale_(series) undertale_au
2d 2d_(artwork) 2d_artwork alternate_universe animated_skeleton blep blush color ectobody ectobreasts ectopussy ectotongue fan_character female_only female_sans ink_sans ink_sans_(fan_character) inktale khorroux leaking_cum looking_at_viewer sans sans_au skeleton small_breasts sole_female solo star_eyes tagme tongue_out uncensored uncensored_breasts uncensored_vagina undertale undertale_(series) undertale_au
2d 2d_(artwork) 2d_artwork alternate_universe animated_skeleton bigger_female blush color cumming dialogue dreamtale ectobody ectobreasts ectopenis ectotongue english english_dialogue english_text ink_sans ink_sans_(fan_character) inktale khorroux leaking_cum multi_tongue nightmare_sans nightmare_sans_(fan_character) paizuri sans sans_au sanscest skeleton smaller_male tagme text thigh_sex titjob tongue uncensored uncensored_penis undertale undertale_(series) undertale_au
2d 2d_(artwork) 2d_artwork alternate_universe animated_skeleton bigger_female blush color cumming dialogue dreamtale ectobody ectobreasts ectopenis ectotongue english english_dialogue english_text ink_sans ink_sans_(fan_character) inktale khorroux leaking_cum multi_tongue nightmare_sans nightmare_sans_(fan_character) paizuri sans sans_au sanscest skeleton smaller_male tagme text thigh_sex titjob tongue uncensored uncensored_penis undertale undertale_(series) undertale_au
2d 2d_(artwork) 2d_artwork alternate_universe animated_skeleton color cum cum_inside cumming_inside dialogue ectobody ectopenis ectopussy ectotongue english english_dialogue english_text fresh_sans heart ink ink_sans ink_sans_(fan_character) inktale khorroux male_penetrating maledom monochrome oversized_hoodie penis pussy sans sans_au sanscest simple_background skeleton tagme tears text tongue tongue_out uncensored uncensored_penis uncensored_vagina undertale undertale_(series) undertale_au x-ray
2d 2d_(artwork) 2d_artwork alternate_universe animated_skeleton color cum cum_inside cumming_inside dialogue ectobody ectopenis ectopussy ectotongue english english_dialogue english_text fresh_sans heart ink ink_sans ink_sans_(fan_character) inktale khorroux male_penetrating maledom monochrome oversized_hoodie penis pussy sans sans_au sanscest simple_background skeleton tagme tears text tongue tongue_out uncensored uncensored_penis uncensored_vagina undertale undertale_(series) undertale_au x-ray
2d 2d_(artwork) 2d_artwork alternate_universe animated_skeleton blush breasts color cumming dialogue dream_sans dream_sans_(fan_character) dreamtale ectobody ectobreasts ectopenis ectopussy ectotongue english english_dialogue english_text futanari incest intersex khorroux naked nightmare_sans nightmare_sans_(fan_character) penis pussy sans sans_au skeleton tagme text tongue_out uncensored uncensored_breasts uncensored_penis undertale undertale_(series) undertale_au
2d 2d_(artwork) 2d_artwork alternate_universe animated_skeleton blush breasts color cumming dialogue dream_sans dream_sans_(fan_character) dreamtale ectobody ectobreasts ectopenis ectopussy ectotongue english english_dialogue english_text futanari incest intersex khorroux naked nightmare_sans nightmare_sans_(fan_character) penis pussy sans sans_au skeleton tagme text tongue_out uncensored uncensored_breasts uncensored_penis undertale undertale_(series) undertale_au
1boy 2010s 2016 animated_skeleton blue_hoodie blue_jacket clothed crossdressing ectopenis ectotongue erection erection_under_clothes erection_under_skirt hooded_jacket hoodie jacket line_art line_art male male_only monster panties panties_around_ankles penis pillow sans sans_(undertale) school_uniform schoolgirl_uniform skeleton sniggysmut socks solo solo_male tongue tongue_out tumblr_username undead undertale undertale_(series) white_background
1boy 2010s 2016 animated_skeleton blue_hoodie blue_jacket clothed crossdressing ectopenis ectotongue erection erection_under_clothes erection_under_skirt hooded_jacket hoodie jacket line_art line_art male male_only monster panties panties_around_ankles penis pillow sans sans_(undertale) school_uniform schoolgirl_uniform skeleton sniggysmut socks solo solo_male tongue tongue_out tumblr_username undead undertale undertale_(series) white_background
2010s 2016 art_trade barefoot blush bondage bound bound_arms cheztnuts choking clothed disembodied_hand ectotongue grabbing_neck kneel malesub rope rope_bondage sams sans sans_(undertale) shirt_pulled_up shirt_up solo_focus submissive sweat tied_up tongue tongue_out topless undertale undertale_(series)
2010s 2016 art_trade barefoot blush bondage bound bound_arms cheztnuts choking clothed disembodied_hand ectotongue grabbing_neck kneel malesub rope rope_bondage sams sans sans_(undertale) shirt_pulled_up shirt_up solo_focus submissive sweat tied_up tongue tongue_out topless undertale undertale_(series)
1:1 1:1_aspect_ratio 2010s 2017 animated_skeleton blue_blush blue_tongue blush bound bound_arms chain_leash chained_arms chained_collar chains clothed collar crying drool ectotongue korean_text monochrome monster non-con non-consensual noncon nonconsensual peng2_(artist) peng2_undertale_(artist) restrained restraints sans sans_(undertale) skeleton solo submissive sweat tears text undead undertale undertale_(series) visible_breath white_background
1:1 1:1_aspect_ratio 2010s 2017 animated_skeleton blue_blush blue_tongue blush bound bound_arms chain_leash chained_arms chained_collar chains clothed collar crying drool ectotongue korean_text monochrome monster non-con non-consensual noncon nonconsensual peng2_(artist) peng2_undertale_(artist) restrained restraints sans sans_(undertale) skeleton solo submissive sweat tears text undead undertale undertale_(series) visible_breath white_background
1:1 1:1_aspect_ratio 2010s 2017 animated_skeleton blush crying ectotongue korean_text monster peng2_(artist) peng2_undertale_(artist) sans sans_(undertale) skeleton solo_focus submissive tears text tongue undead undertale undertale_(series) upper_body
1:1 1:1_aspect_ratio 2010s 2017 animated_skeleton blush crying ectotongue korean_text monster peng2_(artist) peng2_undertale_(artist) sans sans_(undertale) skeleton solo_focus submissive tears text tongue undead undertale undertale_(series) upper_body
1boy animated_skeleton blue_blush blue_dick blue_eyes blue_penis blue_pupils blue_testicles blue_tongue blush ectopenis ectotongue hand_on_floor kneel male male_masturbation male_only masturbation meta_request monster penile_masturbation penis sans sans_(undertale) sans_blush sans_eye sans_glowing_eye sans_penis sinningskeletontrash skeleton solo solo_male tongue tongue_out undead undertale undertale_(series) white_background
1boy animated_skeleton blue_blush blue_dick blue_eyes blue_penis blue_pupils blue_testicles blue_tongue blush ectopenis ectotongue hand_on_floor kneel male male_masturbation male_only masturbation meta_request monster penile_masturbation penis sans sans_(undertale) sans_blush sans_eye sans_glowing_eye sans_penis sinningskeletontrash skeleton solo solo_male tongue tongue_out undead undertale undertale_(series) white_background
animated_skeleton artist_request blue_background blue_blush blue_hoodie blue_jacket blue_tongue blush clothed ectotongue gaster_blaster hooded_jacket hoodie jacket larger_penetrating larger_penetrating_smaller licking long_tongue monster penetration saliva sans sans_(undertale) simple_background size_difference skeleton smaller_penetrated solid_color_background solo_focus tongue tongue_fucking tongue_out tongue_penetration undead undertale undertale_(series) wet
animated_skeleton artist_request blue_background blue_blush blue_hoodie blue_jacket blue_tongue blush clothed ectotongue gaster_blaster hooded_jacket hoodie jacket larger_penetrating larger_penetrating_smaller licking long_tongue monster penetration saliva sans sans_(undertale) simple_background size_difference skeleton smaller_penetrated solid_color_background solo_focus tongue tongue_fucking tongue_out tongue_penetration undead undertale undertale_(series) wet
animated_skeleton ass_up blue_blush blush cockotron cussing drooling ectotongue fangs fvdsfs grabbing_sheets gripping_sheets kneeling masturbation moaning monster pillow sans sans_(undertale) sex_toy skeleton solo swearing tongue_out top-down_bottom-up trembling undead undertale undertale_(series) vibrator
animated_skeleton ass_up blue_blush blush cockotron cussing drooling ectotongue fangs fvdsfs grabbing_sheets gripping_sheets kneeling masturbation moaning monster pillow sans sans_(undertale) sex_toy skeleton solo swearing tongue_out top-down_bottom-up trembling undead undertale undertale_(series) vibrator
1:1 1:1_aspect_ratio 2010s 2016 2boys animated_skeleton bigger_dom bigger_dom_smaller_sub bigger_male black_background black_hair blue_hoodie blue_jacket blue_tongue clothed dark_background ectotongue fel-fisk femboy gay glowing high_heel_boots high_heels hooded_jacket hoodie humanoid_robot jacket larger_male licking male male/male male_only mettaton mettaton_ex one_eye_closed partially_clothed partially_nude pink_eyes pink_tongue robot robot_boy robot_femboy robot_humanoid sans sans_(undertale) skeleton slippers small_sub small_sub_big_dom smaller_sub smaller_sub_bigger_dom soul soul_sex sweat tongue tongue_out undead undertale undertale_(series) yaoi
1:1 1:1_aspect_ratio 2010s 2016 2boys animated_skeleton bigger_dom bigger_dom_smaller_sub bigger_male black_background black_hair blue_hoodie blue_jacket blue_tongue clothed dark_background ectotongue fel-fisk femboy gay glowing high_heel_boots high_heels hooded_jacket hoodie humanoid_robot jacket larger_male licking male male/male male_only mettaton mettaton_ex one_eye_closed partially_clothed partially_nude pink_eyes pink_tongue robot robot_boy robot_femboy robot_humanoid sans sans_(undertale) skeleton slippers small_sub small_sub_big_dom smaller_sub smaller_sub_bigger_dom soul soul_sex sweat tongue tongue_out undead undertale undertale_(series) yaoi
2010s 2015 2boys animated_skeleton artist_request big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_eye blue_tongue boots box dominant dominant_male domination ectotongue english_text glowing_eyes hair_over_one_eye high_heel_boots humanoid_robot larger_male licking_leg male male/male male_only maledom mettaton mettaton_ex monster naked nude penis pink_boots pink_eyes pink_glans pink_tongue robot robot_humanoid robotic_penis sans sans_(undertale) simple_background skeleton small_sub small_sub_big_dom smaller_sub smaller_sub_bigger_dom solid_color_background submissive text tongue undead undertale undertale_(series) what yaoi
2010s 2015 2boys animated_skeleton artist_request big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_eye blue_tongue boots box dominant dominant_male domination ectotongue english_text glowing_eyes hair_over_one_eye high_heel_boots humanoid_robot larger_male licking_leg male male/male male_only maledom mettaton mettaton_ex monster naked nude penis pink_boots pink_eyes pink_glans pink_tongue robot robot_humanoid robotic_penis sans sans_(undertale) simple_background skeleton small_sub small_sub_big_dom smaller_sub smaller_sub_bigger_dom solid_color_background submissive text tongue undead undertale undertale_(series) what yaoi
1boy 1boy1girl 1girls 2d animated_skeleton blush color ectotongue english english_text female female_frisk female_human female_penetrated frisk human human_penetrated male male/female male_penetrating male_penetrating_female monster nsfwshamecave orange_blush orange_tongue papyrus skeleton straight striped_clothing striped_shirt text undead undertale undertale_(series) undertale_fanfiction
1boy 1boy1girl 1girls 2d animated_skeleton blush color ectotongue english english_text female female_frisk female_human female_penetrated frisk human human_penetrated male male/female male_penetrating male_penetrating_female monster nsfwshamecave orange_blush orange_tongue papyrus skeleton straight striped_clothing striped_shirt text undead undertale undertale_(series) undertale_fanfiction
1:1 1:1_aspect_ratio 2016 animated_skeleton blowjob_pov blue_blush blue_tongue blush cockotron ectotongue faceless_male fellatio fvdsfs gay licking licking_penis long_tongue male male_pov monster oral penis penis_in_mouth pink_sweater pov sans sans_(undertale) simple_background skeleton solo_focus sweat sweater tongue undead undertale undertale_(series) unseen_male_face upper_body white_background
1:1 1:1_aspect_ratio 2016 animated_skeleton blowjob_pov blue_blush blue_tongue blush cockotron ectotongue faceless_male fellatio fvdsfs gay licking licking_penis long_tongue male male_pov monster oral penis penis_in_mouth pink_sweater pov sans sans_(undertale) simple_background skeleton solo_focus sweat sweater tongue undead undertale undertale_(series) unseen_male_face upper_body white_background
2015 animated_skeleton blue_tentacles blue_tongue bottomless clothed cockotron drooling ectotongue fvdsfs jacket jacket_only male male_focus monochrome monster sans sans_(undertale) skeleton solo_focus tentacle tentacles_around_arms tentacles_around_legs tentacles_around_wrists tongue tongue_out tumblr_username undead undertale undertale_(series)
2015 animated_skeleton blue_tentacles blue_tongue bottomless clothed cockotron drooling ectotongue fvdsfs jacket jacket_only male male_focus monochrome monster sans sans_(undertale) skeleton solo_focus tentacle tentacles_around_arms tentacles_around_legs tentacles_around_wrists tongue tongue_out tumblr_username undead undertale undertale_(series)
animated_skeleton blue_hoodie blue_jacket blue_tongue ectotongue faceless_male fellatio gay grabbing_head hand_on_another's_head head_grab heart-shaped_pupils heart_eyes hooded_jacket hoodie jacket ksuriuri licking_penis male monster sans sans_(undertale) shortsnas skeleton solo_focus sucking_penis tongue undead undertale undertale_(series) unseen_male_face yaoi
animated_skeleton blue_hoodie blue_jacket blue_tongue ectotongue faceless_male fellatio gay grabbing_head hand_on_another's_head head_grab heart-shaped_pupils heart_eyes hooded_jacket hoodie jacket ksuriuri licking_penis male monster sans sans_(undertale) shortsnas skeleton solo_focus sucking_penis tongue undead undertale undertale_(series) unseen_male_face yaoi
2015 animated_skeleton blue_blush blue_hoodie blue_jacket blue_tongue blush color ectotongue english_text eye_fucking eye_penetration eye_socket_penetration gay heart-shaped_pupils heart_eyes hooded_jacket hoodie jacket male monster penis saliva sans sans_(undertale) skeleton skull_fucking solo_focus suckmytrombone text tongue tongue_out undead undertale undertale_(series) white_background
2015 animated_skeleton blue_blush blue_hoodie blue_jacket blue_tongue blush color ectotongue english_text eye_fucking eye_penetration eye_socket_penetration gay heart-shaped_pupils heart_eyes hooded_jacket hoodie jacket male monster penis saliva sans sans_(undertale) skeleton skull_fucking solo_focus suckmytrombone text tongue tongue_out undead undertale undertale_(series) white_background
ambiguous_fluids animated_skeleton basho_lizard blue_blush blue_hoodie blue_jacket blue_popsicle blue_tongue blush clothed ectotongue fluids hooded_jacket hoodie jacket monster pixiv_id_7835302 popsicle sans sans_(undertale) skeleton solo_focus submissive suggestive suggestive_fluid suggestive_food tongue tongue_out undead undertale undertale_(series) upper_body
ambiguous_fluids animated_skeleton basho_lizard blue_blush blue_hoodie blue_jacket blue_popsicle blue_tongue blush clothed ectotongue fluids hooded_jacket hoodie jacket monster pixiv_id_7835302 popsicle sans sans_(undertale) skeleton solo_focus submissive suggestive suggestive_fluid suggestive_food tongue tongue_out undead undertale undertale_(series) upper_body
animated_skeleton basho_lizard blue_blush blue_hoodie blue_jacket blue_popsicle blue_tongue blush clothed ectotongue gloves hooded_jacket hoodie ice_cream jacket monster not_porn pixiv_id_7835302 popsicle sans sans_(undertale) skeleton solo_focus submissive suggestive suggestive_food tongue tongue_out undead undertale undertale_(series) upper_body white_background
animated_skeleton basho_lizard blue_blush blue_hoodie blue_jacket blue_popsicle blue_tongue blush clothed ectotongue gloves hooded_jacket hoodie ice_cream jacket monster not_porn pixiv_id_7835302 popsicle sans sans_(undertale) skeleton solo_focus submissive suggestive suggestive_food tongue tongue_out undead undertale undertale_(series) upper_body white_background
2010s 2018 animated_skeleton blue_blush blue_eyes blue_tongue bondage bound_arms bound_legs ectotongue headogs heart-shaped_pupils heart_eyes looking_at_viewer monster naked nude sans sans_(undertale) skeleton solo submissive tied_up tongue tongue_out undead undertale undertale_(series)
2010s 2018 animated_skeleton blue_blush blue_eyes blue_tongue bondage bound_arms bound_legs ectotongue headogs heart-shaped_pupils heart_eyes looking_at_viewer monster naked nude sans sans_(undertale) skeleton solo submissive tied_up tongue tongue_out undead undertale undertale_(series)
2018 animated_skeleton blue_blush blue_eyes blue_tongue clothed ectotongue headogs heart-shaped_pupils heart_eyes male monster orange_penis penetration penis sans sans_(undertale) sex skeleton solo_focus submissive tongue tongue_out undead undertale undertale_(series)
2018 animated_skeleton blue_blush blue_eyes blue_tongue clothed ectotongue headogs heart-shaped_pupils heart_eyes male monster orange_penis penetration penis sans sans_(undertale) sex skeleton solo_focus submissive tongue tongue_out undead undertale undertale_(series)
2018 animated_skeleton blue_eye blue_tongue completely_naked completely_nude drooling ectoplasm ectotongue egg egg_laying eggs heki_(artist) kneel laying_eggs monster naked nude sans sans_(undertale) skeleton solo sweat tongue tongue_out undead undertale undertale_(series) white_background
2018 animated_skeleton blue_eye blue_tongue completely_naked completely_nude drooling ectoplasm ectotongue egg egg_laying eggs heki_(artist) kneel laying_eggs monster naked nude sans sans_(undertale) skeleton solo sweat tongue tongue_out undead undertale undertale_(series) white_background
1boy 2015 ahe_gao animated_skeleton arms_behind_back blue_blush blue_dick blue_eyes blue_penis blue_pupils blue_testicles blue_tongue blush bodily_fluids bound_arms chubby chubby_male clothed cum ectopenis ectotongue erect_penis fluids hands_behind_back heart heart_eyes hooded_jacket hoodie jacket male male_only meta_request monochrome monster orgasm_face overstimulation penis penis_out pleasure_face sans sans_(undertale) sans_blush sans_eye sans_glowing_eye sans_penis sitting skeleton solo_male suckmytrombone sweat sweater text tied_arms tied_up tongue tongue_out undead undertale undertale_(series) white_background
1boy 2015 ahe_gao animated_skeleton arms_behind_back blue_blush blue_dick blue_eyes blue_penis blue_pupils blue_testicles blue_tongue blush bodily_fluids bound_arms chubby chubby_male clothed cum ectopenis ectotongue erect_penis fluids hands_behind_back heart heart_eyes hooded_jacket hoodie jacket male male_only meta_request monochrome monster orgasm_face overstimulation penis penis_out pleasure_face sans sans_(undertale) sans_blush sans_eye sans_glowing_eye sans_penis sitting skeleton solo_male suckmytrombone sweat sweater text tied_arms tied_up tongue tongue_out undead undertale undertale_(series) white_background
animated_skeleton basho_lizard blue_tongue bodily_fluids clothed crying ectotongue flower flowey_the_flower fluids monster pixiv_id_7835302 plant sans sans_(undertale) sex skeleton sweat tears tentacle tentacles_under_clothes tongue tongue_out trembling twitching undead undertale undertale_(series) vines vines_tentacles white_background
animated_skeleton basho_lizard blue_tongue bodily_fluids clothed crying ectotongue flower flowey_the_flower fluids monster pixiv_id_7835302 plant sans sans_(undertale) sex skeleton sweat tears tentacle tentacles_under_clothes tongue tongue_out trembling twitching undead undertale undertale_(series) vines vines_tentacles white_background
1boy 1girl 2024 2d absurd_res ahegao animated_skeleton anus areolae arm_support ass big_breasts blue_areola blue_blush blue_body blue_breasts blue_nipples blue_pussy blue_tongue blush bottom_sans breasts brother/sister brother_and_sister chubby digital_media duo ectobody ectobreasts ectotongue female_ejaculation female_focus female_sans fontcest genderswap genderswap_(mtf) genitals incest intraspecies licking licking_pussy male male/female moaning monster multiple_orgasms multiple_views navel nipples nude nude_female oral oral_sex orange_blush orgasm papyrus_(undertale) papysans pussy pussylicking renrilu_art sans_(undertale) sex sibling_incest siblings simple_background skeleton solo_focus spread_legs squirting submissive thighs tongue tongue_out top_papyrus undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background
1boy 1girl 2024 2d absurd_res ahegao animated_skeleton anus areolae arm_support ass big_breasts blue_areola blue_blush blue_body blue_breasts blue_nipples blue_pussy blue_tongue blush bottom_sans breasts brother/sister brother_and_sister chubby digital_media duo ectobody ectobreasts ectotongue female_ejaculation female_focus female_sans fontcest genderswap genderswap_(mtf) genitals incest intraspecies licking licking_pussy male male/female moaning monster multiple_orgasms multiple_views navel nipples nude nude_female oral oral_sex orange_blush orgasm papyrus_(undertale) papysans pussy pussylicking renrilu_art sans_(undertale) sex sibling_incest siblings simple_background skeleton solo_focus spread_legs squirting submissive thighs tongue tongue_out top_papyrus undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background
1girl 2023 2d animated_skeleton blue_body blue_breasts blue_pussy bottom_sans breast_grab breasts completely_nude completely_nude_female digital_media drooling ectobody ectobreasts ectotongue female_masturbation female_only female_sans fingering fingering_pussy fingering_self genderswap genderswap_(mtf) genital_fluids genitals grabbing_own_breast kneeling masturbation monster multiple_views navel nipples nude nude_female pussy pussy_juice russianfig sans_(undertale) skeleton solo_female spread_legs submissive tears tongue tongue_out undead undertale undertale_(series) vaginal vaginal_fingering vaginal_masturbation video_game_character video_games
1girl 2023 2d animated_skeleton blue_body blue_breasts blue_pussy bottom_sans breast_grab breasts completely_nude completely_nude_female digital_media drooling ectobody ectobreasts ectotongue female_masturbation female_only female_sans fingering fingering_pussy fingering_self genderswap genderswap_(mtf) genital_fluids genitals grabbing_own_breast kneeling masturbation monster multiple_views navel nipples nude nude_female pussy pussy_juice russianfig sans_(undertale) skeleton solo_female spread_legs submissive tears tongue tongue_out undead undertale undertale_(series) vaginal vaginal_fingering vaginal_masturbation video_game_character video_games
2010s 2015 2boys 2d 2d_(artwork) animated_skeleton anon anonymous anonymous_male artist_name bad_id bad_tumblr_id blue_background blue_eye blue_tongue bottom_sans clothed cum cum_on_face cum_on_tongue digital_media_(artwork) ectotongue faceless_male fellatio genitals glowing_eye inactive_account jacket licking licking_penis male male/male male_only monster multiple_views noxiousaberration oral penis sans sans_(undertale) sex simple_background skeleton solo_focus submissive submissive_male sweat tongue tumblr uke_sans undead undertale undertale_(series) unseen_male_face upper_body video_game_character video_games yaoi
2010s 2015 2boys 2d 2d_(artwork) animated_skeleton anon anonymous anonymous_male artist_name bad_id bad_tumblr_id blue_background blue_eye blue_tongue bottom_sans clothed cum cum_on_face cum_on_tongue digital_media_(artwork) ectotongue faceless_male fellatio genitals glowing_eye inactive_account jacket licking licking_penis male male/male male_only monster multiple_views noxiousaberration oral penis sans sans_(undertale) sex simple_background skeleton solo_focus submissive submissive_male sweat tongue tumblr uke_sans undead undertale undertale_(series) unseen_male_face upper_body video_game_character video_games yaoi
1boy 1girl 2023 2d animated_skeleton anonymous anonymous_male artist_name artist_watermark bottom_sans bottomless breasts chubby clothed clothing digital_media ech7474 ectobelly ectobreasts ectotongue english_text faceless_male female_sans genderswap genderswap_(mtf) gloves hands_in_pockets hetero hooded_jacket hoodie irrumatio jacket laying_down laying_on_back legwear lying_down lying_on_back male monochrome monster multiple_views oral panties sans_(undertale) sepia sex simple_background skeleton slippers stockings sweater talking tears text thighhighs thighs thrusting thrusting_into_mouth tongue tongue_out undead undertale undertale_(series) video_game_character video_games watermark
1boy 1girl 2023 2d animated_skeleton anonymous anonymous_male artist_name artist_watermark bottom_sans bottomless breasts chubby clothed clothing digital_media ech7474 ectobelly ectobreasts ectotongue english_text faceless_male female_sans genderswap genderswap_(mtf) gloves hands_in_pockets hetero hooded_jacket hoodie irrumatio jacket laying_down laying_on_back legwear lying_down lying_on_back male monochrome monster multiple_views oral panties sans_(undertale) sepia sex simple_background skeleton slippers stockings sweater talking tears text thighhighs thighs thrusting thrusting_into_mouth tongue tongue_out undead undertale undertale_(series) video_game_character video_games watermark
1girl 2020s 2023 2d 2d_(artwork) animated_skeleton artist_name artist_watermark ass black_legwear black_stockings black_thighhighs blue_body blue_breasts blue_nipples blue_penis bottom_sans bottomless breasts chubby clothed clothing digital_media_(artwork) ech7474 ectopenis ectopussy ectotongue female_sans free_use genderswap genderswap_(mtf) genitals gloves hooded_jacket hoodie jacket kabeshiri legwear male male/female milking milking_breasts milking_machine monster multiple_views nipples orange_background penetration penis pussy rule_63 sans sans_(undertale) sex sex_from_behind simple_background skeleton solid_color_background solo_focus stockings stuck stuck_in_wall submissive sweater tears thighhighs thrusting tongue tongue_out twitching twitter uke_sans undead undertale undertale_(series) video_game_character video_games wall wall_(structure) watermark white_gloves
1girl 2020s 2023 2d 2d_(artwork) animated_skeleton artist_name artist_watermark ass black_legwear black_stockings black_thighhighs blue_body blue_breasts blue_nipples blue_penis bottom_sans bottomless breasts chubby clothed clothing digital_media_(artwork) ech7474 ectopenis ectopussy ectotongue female_sans free_use genderswap genderswap_(mtf) genitals gloves hooded_jacket hoodie jacket kabeshiri legwear male male/female milking milking_breasts milking_machine monster multiple_views nipples orange_background penetration penis pussy rule_63 sans sans_(undertale) sex sex_from_behind simple_background skeleton solid_color_background solo_focus stockings stuck stuck_in_wall submissive sweater tears thighhighs thrusting tongue tongue_out twitching twitter uke_sans undead undertale undertale_(series) video_game_character video_games wall wall_(structure) watermark white_gloves
2015 2boys 2d animated_skeleton arm_support bad_id bad_tumblr_id big_penis bigger_male blue_background bodily_fluids bottom_sans brother/brother brothers closed_eyes clothed clothed_male clothing digital_media duo ectopenis ectotongue erection fellatio fluids fontcest genitals gloves hooded_jacket hoodie inactive_account incest intraspecies jacket larger_male male male/male male_only monster monster_boy noxiousaberration open_mouth oral orange_penis orange_tongue papyrus_(undertale) papysans partially_colored penis penis_grab penis_through_clothing sans_(undertale) scarf sex sibling_incest siblings skeleton smaller_male solo_focus sweat teeth testicles third-party_source tongue top_papyrus undead undertale undertale_(series) video_game_character video_games yaoi
2015 2boys 2d animated_skeleton arm_support bad_id bad_tumblr_id big_penis bigger_male blue_background bodily_fluids bottom_sans brother/brother brothers closed_eyes clothed clothed_male clothing digital_media duo ectopenis ectotongue erection fellatio fluids fontcest genitals gloves hooded_jacket hoodie inactive_account incest intraspecies jacket larger_male male male/male male_only monster monster_boy noxiousaberration open_mouth oral orange_penis orange_tongue papyrus_(undertale) papysans partially_colored penis penis_grab penis_through_clothing sans_(undertale) scarf sex sibling_incest siblings skeleton smaller_male solo_focus sweat teeth testicles third-party_source tongue top_papyrus undead undertale undertale_(series) video_game_character video_games yaoi
2boys 2d after_penetration after_sex ahegao anal animated_skeleton arm_support ass ass_grab bad_id bad_tumblr_id bigger_penetrating blue_blush blue_hoodie blue_jacket blue_tongue blush bone bottom_on_top bottom_sans bottomless brother/brother brothers clothed clothed_male clothed_sex clothing cum cum_leaking cum_trail digital_media drooling duo ectopenis ectoplasm ectotongue erection facing_another fontcest fully_clothed fully_clothed_male genital_fluids genitals gloves heart heart-shaped_pupils heart_eyes hooded_jacket hoodie humanoid humanoid_penis incest intraspecies jacket kneel kneeling larger_penetrating larger_penetrating_smaller looking_at_another looking_at_partner male male/male male_ahegao male_only male_penetrating mastery_position monster monster_boy open_mouth orange_blush orange_penis panting papyrus_(undertale) papysans partially_clothed penis penis_through_clothing power_bottom red_gloves sans_(undertale) sex sibling_incest siblings sitting skeleton smaller_penetrated spoopy-gaster straddling submissive_top sweat third-party_source tongue tongue_out top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games visible_breath white_background yaoi
2boys 2d after_penetration after_sex ahegao anal animated_skeleton arm_support ass ass_grab bad_id bad_tumblr_id bigger_penetrating blue_blush blue_hoodie blue_jacket blue_tongue blush bone bottom_on_top bottom_sans bottomless brother/brother brothers clothed clothed_male clothed_sex clothing cum cum_leaking cum_trail digital_media drooling duo ectopenis ectoplasm ectotongue erection facing_another fontcest fully_clothed fully_clothed_male genital_fluids genitals gloves heart heart-shaped_pupils heart_eyes hooded_jacket hoodie humanoid humanoid_penis incest intraspecies jacket kneel kneeling larger_penetrating larger_penetrating_smaller looking_at_another looking_at_partner male male/male male_ahegao male_only male_penetrating mastery_position monster monster_boy open_mouth orange_blush orange_penis panting papyrus_(undertale) papysans partially_clothed penis penis_through_clothing power_bottom red_gloves sans_(undertale) sex sibling_incest siblings sitting skeleton smaller_penetrated spoopy-gaster straddling submissive_top sweat third-party_source tongue tongue_out top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games visible_breath white_background yaoi
1:1 1boy 1cuntboy 2017 2d ahegao animated_skeleton anonymous blue_blush blue_clitoris blue_penis blue_pussy blue_tongue blush bottom_sans bottomless bottomless_male candle clitoris closed_eyes clothed clothed_male clothing cum cumshot cuntboy cuntboysub digital_media disembodied_hand drooling ectopenis ectoplasm ectopussy ectotongue ejaculation english_text erection genitals hand hoodie jacket kneel looking_pleasured male male_ahegao male_focus male_moaning malesub masturbation micro micro_male microphilia miniboy moaning monochrome monster multiple_views nude nude_male orgasm partially_clothed partially_clothed_male partially_colored penetration penis phone pleasure_face plushie pussy sans_(undertale) sex simple_background size_difference skeleton slippers small_penis smaller_male smartphone smooth_penis socks solo_focus solo_male speech_bubble submissive submissive_cuntboy submissive_male tears text the-shewolf-den tongue tongue_out topwear uke_sans undead undertale undertale_(series) vibrating video_game_character video_games
1:1 1boy 1cuntboy 2017 2d ahegao animated_skeleton anonymous blue_blush blue_clitoris blue_penis blue_pussy blue_tongue blush bottom_sans bottomless bottomless_male candle clitoris closed_eyes clothed clothed_male clothing cum cumshot cuntboy cuntboysub digital_media disembodied_hand drooling ectopenis ectoplasm ectopussy ectotongue ejaculation english_text erection genitals hand hoodie jacket kneel looking_pleasured male male_ahegao male_focus male_moaning malesub masturbation micro micro_male microphilia miniboy moaning monochrome monster multiple_views nude nude_male orgasm partially_clothed partially_clothed_male partially_colored penetration penis phone pleasure_face plushie pussy sans_(undertale) sex simple_background size_difference skeleton slippers small_penis smaller_male smartphone smooth_penis socks solo_focus solo_male speech_bubble submissive submissive_cuntboy submissive_male tears text the-shewolf-den tongue tongue_out topwear uke_sans undead undertale undertale_(series) vibrating video_game_character video_games
1boy 1other 2016 2d ambiguous_gender anal animated_skeleton anonymous artist_name bittersweetdeath blue_blush blue_penis blue_tongue blush bottom_sans closed_eyes completely_nude completely_nude_male digital_media disembodied_hand disembodied_hands drooling ectoplasm ectotongue fingering fluids hand hands heart_eyes macrophilia male male_focus male_moaning micro micro_male microphilia miniboy moaning monster nude nude_male penetration pink_background sans_(undertale) simple_background size_difference skeleton smaller_male solid_color_background solo_focus solo_male spoken_heart spread_legs submissive submissive_male teeth tongue tongue_out trembling trembling_legs undead undertale undertale_(series) video_games
1boy 1other 2016 2d ambiguous_gender anal animated_skeleton anonymous artist_name bittersweetdeath blue_blush blue_penis blue_tongue blush bottom_sans closed_eyes completely_nude completely_nude_male digital_media disembodied_hand disembodied_hands drooling ectoplasm ectotongue fingering fluids hand hands heart_eyes macrophilia male male_focus male_moaning micro micro_male microphilia miniboy moaning monster nude nude_male penetration pink_background sans_(undertale) simple_background size_difference skeleton smaller_male solid_color_background solo_focus solo_male spoken_heart spread_legs submissive submissive_male teeth tongue tongue_out trembling trembling_legs undead undertale undertale_(series) video_games
1boy 1cuntboy 2016 2d ahegao animated_skeleton artist_name blue_blush blue_body blue_tongue blush bodily_fluids bottom_sans bottomless bottomless_cuntboy brother/brother brother_penetrating_brother brothers brown_background carrying carrying_partner carrying_position clothed clothing cuntboy cuntboy_penetrated digital_media duo ectobody ectopenis ectoplasm ectopussy ectotongue english_text fangs fontcest gasterass genitals gradient_legwear heart-shaped_pupils incest intraspecies legwear male male/cuntboy male_penetrating male_penetrating_cuntboy monster monster_boy nude orange_body orange_penis orange_tongue orsnge_blush papyrus_(undertale) papysans penetration penis pleasure_face profanity pussy sans_(undertale) sex sibling_incest siblings simple_background sitting skeleton solid_color_background speech_bubble stockings talking talking_to_another talking_to_partner teeth text thighhighs tongue tongue_out top_papyrus topwear two-tone_legwear two_tone_legwear undead undertale undertale_(series) vaginal vaginal_penetration vaginal_sex video_game_character video_games yaoi
1boy 1cuntboy 2016 2d ahegao animated_skeleton artist_name blue_blush blue_body blue_tongue blush bodily_fluids bottom_sans bottomless bottomless_cuntboy brother/brother brother_penetrating_brother brothers brown_background carrying carrying_partner carrying_position clothed clothing cuntboy cuntboy_penetrated digital_media duo ectobody ectopenis ectoplasm ectopussy ectotongue english_text fangs fontcest gasterass genitals gradient_legwear heart-shaped_pupils incest intraspecies legwear male male/cuntboy male_penetrating male_penetrating_cuntboy monster monster_boy nude orange_body orange_penis orange_tongue orsnge_blush papyrus_(undertale) papysans penetration penis pleasure_face profanity pussy sans_(undertale) sex sibling_incest siblings simple_background sitting skeleton solid_color_background speech_bubble stockings talking talking_to_another talking_to_partner teeth text thighhighs tongue tongue_out top_papyrus topwear two-tone_legwear two_tone_legwear undead undertale undertale_(series) vaginal vaginal_penetration vaginal_sex video_game_character video_games yaoi
1boy 1girl 2018 2d ahegao animated_skeleton anthro anthro_on_humanoid anthro_penetrating anthro_penetrating_humanoid ass big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_female bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush boss_monster bottom_sans breasts caprine digital_media_(artwork) disembodied_hand disembodied_hands dominant dominant_anthro dominant_female dominant_pov duo ectoplasm ectotongue english_text female/male female_anthro female_penetrating female_penetrating_male female_pov femdom floppy_ears from_front_position fur furry furry_female goat goat_girl grabbing_sheets gripping_sheets heart-shaped_pupils heart_eyes hetero humanoid humanoid_penetrated interlocked_fingers interspecies intertwined_fingers ireallyneedtofindabetternamesoon larger_anthro larger_female larger_penetrating larger_penetrating_smaller leg_grab male male_focus male_moaning male_penetrated malesub mature mature_anthro mature_female milf moaning monster monster_boy monster_girl nude nude_male open_mouth partial_female pegging penetrating_pov penetration penetrator_pov pink_background pleasure_face sans_(undertale) sequential sex sex_toy simple_background size_difference skeleton small_sub small_sub_big_dom smaller_humanoid smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom solo_focus straight strap-on submissive submissive_male tail tail_tuft tears text tongue tongue_out toriel torisans undead undertale undertale_(series) unseen_female_face video_game_character video_games white_body white_fur
1boy 1girl 2018 2d ahegao animated_skeleton anthro anthro_on_humanoid anthro_penetrating anthro_penetrating_humanoid ass big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_female bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush boss_monster bottom_sans breasts caprine digital_media_(artwork) disembodied_hand disembodied_hands dominant dominant_anthro dominant_female dominant_pov duo ectoplasm ectotongue english_text female/male female_anthro female_penetrating female_penetrating_male female_pov femdom floppy_ears from_front_position fur furry furry_female goat goat_girl grabbing_sheets gripping_sheets heart-shaped_pupils heart_eyes hetero humanoid humanoid_penetrated interlocked_fingers interspecies intertwined_fingers ireallyneedtofindabetternamesoon larger_anthro larger_female larger_penetrating larger_penetrating_smaller leg_grab male male_focus male_moaning male_penetrated malesub mature mature_anthro mature_female milf moaning monster monster_boy monster_girl nude nude_male open_mouth partial_female pegging penetrating_pov penetration penetrator_pov pink_background pleasure_face sans_(undertale) sequential sex sex_toy simple_background size_difference skeleton small_sub small_sub_big_dom smaller_humanoid smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom solo_focus straight strap-on submissive submissive_male tail tail_tuft tears text tongue tongue_out toriel torisans undead undertale undertale_(series) unseen_female_face video_game_character video_games white_body white_fur
2017 2boys 2d ahegao anal animated_skeleton announcing_orgasm artist_name blue_blush blue_tongue blush boots bottom_sans bottomless_skirt brother/brother brother_penetrating_brother brothers christmas christmas_hat christmas_outfit clothed clothing comic comic_page comic_panel couch couch_sex crossdressing cum digital_media drooling duo ectopenis ectoplasm ectotongue edit edited ejaculation english_text fontcest from_front_position gloves hat holidays incest interlocked_fingers intertwined_fingers intraspecies large_filesize legwear long_image making_out male male/male male_only male_penetrated male_penetrating male_penetrating_male merry_christmas midriff missionary_position monochrome monster monster_boy multiple_images orgasm papyrus_(undertale) papysans partially_colored penetration red_blush red_penis red_tongue removing_glove saliva saliva_trail sans_(undertale) santa_costume santa_hat scarf sequential sex short_skirt sibling_incest siblings skeleton skirt sofa stockings talking tall_image tears teeth text third-party_edit thornisicezins thrusting tongue top_papyrus topwear touching_crotch tumblr_username typo undead undertale undertale_(series) video_games wink yaoi
2017 2boys 2d ahegao anal animated_skeleton announcing_orgasm artist_name blue_blush blue_tongue blush boots bottom_sans bottomless_skirt brother/brother brother_penetrating_brother brothers christmas christmas_hat christmas_outfit clothed clothing comic comic_page comic_panel couch couch_sex crossdressing cum digital_media drooling duo ectopenis ectoplasm ectotongue edit edited ejaculation english_text fontcest from_front_position gloves hat holidays incest interlocked_fingers intertwined_fingers intraspecies large_filesize legwear long_image making_out male male/male male_only male_penetrated male_penetrating male_penetrating_male merry_christmas midriff missionary_position monochrome monster monster_boy multiple_images orgasm papyrus_(undertale) papysans partially_colored penetration red_blush red_penis red_tongue removing_glove saliva saliva_trail sans_(undertale) santa_costume santa_hat scarf sequential sex short_skirt sibling_incest siblings skeleton skirt sofa stockings talking tall_image tears teeth text third-party_edit thornisicezins thrusting tongue top_papyrus topwear touching_crotch tumblr_username typo undead undertale undertale_(series) video_games wink yaoi
2017 2boys 2d ahegao anal animated_skeleton announcing_orgasm blue_blush blue_tongue blush bottom_sans bottomless_skirt brother/brother brother_penetrating_brother brothers christmas christmas_outfit clothed clothing comic comic_page comic_panel couch couch_sex crossdressing cum digital_media duo ectopenis ectoplasm ectotongue ejaculation english_text fontcest holidays incest interlocked_fingers intertwined_fingers intraspecies legwear male male/male male_only male_penetrated male_penetrating male_penetrating_male merry_christmas midriff missionary_position monochrome monster monster_boy on_couch orgasm papyrus_(undertale) papysans partially_colored red_blush red_penis sans_(undertale) santa_costume scarf sequential sex sibling_incest siblings skeleton skirt stockings sweat talking tears teeth text thornisicezins tongue top_papyrus topwear typo undead undertale undertale_(series) video_games yaoi
2017 2boys 2d ahegao anal animated_skeleton announcing_orgasm blue_blush blue_tongue blush bottom_sans bottomless_skirt brother/brother brother_penetrating_brother brothers christmas christmas_outfit clothed clothing comic comic_page comic_panel couch couch_sex crossdressing cum digital_media duo ectopenis ectoplasm ectotongue ejaculation english_text fontcest holidays incest interlocked_fingers intertwined_fingers intraspecies legwear male male/male male_only male_penetrated male_penetrating male_penetrating_male merry_christmas midriff missionary_position monochrome monster monster_boy on_couch orgasm papyrus_(undertale) papysans partially_colored red_blush red_penis sans_(undertale) santa_costume scarf sequential sex sibling_incest siblings skeleton skirt stockings sweat talking tears teeth text thornisicezins tongue top_papyrus topwear typo undead undertale undertale_(series) video_games yaoi
2017 2boys 2d anal animated_skeleton artist_name blue_blush blue_tongue blush boots bottom_sans bottomless_skirt brother/brother brother_penetrating_brother brothers christmas christmas_hat christmas_outfit clothed clothing comic comic_page comic_panel couch crossdressing digital_media duo ectotongue english_text fontcest from_front_position gloves hat holidays incest intraspecies legwear making_out male male/male male_only male_penetrated male_penetrating male_penetrating_male merry_christmas midriff missionary_position monochrome monster monster_boy on_couch papyrus_(undertale) papysans partially_colored red_blush red_tongue removing_glove saliva saliva_trail sans_(undertale) santa_costume santa_hat scarf sequential sex short_skirt sibling_incest siblings skeleton skirt stockings talking teeth text thornisicezins tongue top_papyrus topwear touching_crotch tumblr_username typo undead undertale undertale_(series) video_games yaoi
2017 2boys 2d anal animated_skeleton artist_name blue_blush blue_tongue blush boots bottom_sans bottomless_skirt brother/brother brother_penetrating_brother brothers christmas christmas_hat christmas_outfit clothed clothing comic comic_page comic_panel couch crossdressing digital_media duo ectotongue english_text fontcest from_front_position gloves hat holidays incest intraspecies legwear making_out male male/male male_only male_penetrated male_penetrating male_penetrating_male merry_christmas midriff missionary_position monochrome monster monster_boy on_couch papyrus_(undertale) papysans partially_colored red_blush red_tongue removing_glove saliva saliva_trail sans_(undertale) santa_costume santa_hat scarf sequential sex short_skirt sibling_incest siblings skeleton skirt stockings talking teeth text thornisicezins tongue top_papyrus topwear touching_crotch tumblr_username typo undead undertale undertale_(series) video_games yaoi
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1girl 2020s 2023 2d 2d_(artwork) animated_skeleton artist_name ass big_breasts blue_pussy blush bottom_sans breasts chubby chubby_female clothed clothing digital_media_(artwork) ech7474 ectobody ectobreasts ectopussy ectotongue female_only female_sans genderswap genderswap_(mtf) hooded_jacket hoodie jacket legwear monochrome monster nipples partially_clothed partially_clothed_female partially_colored pussy rule_63 sans sans_(undertale) simple_background skeleton slippers solo_female stockings sweat tears tentacle tentacle_around_neck tentacle_sex tentacles_around_breasts tentacles_around_legs thighhighs tongue tongue_out uke_sans undead undertale undertale_(series) vaginal vaginal_penetration video_games white_background
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2018 2boys 2d anal animated_gif animated_skeleton artist_name big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blue_eyes blue_penis blue_tongue blush bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers clothed clothing crying crying_with_eyes_open digital_media dominant dominant_male duo ectopenis ectotongue edit fontcest from_behind_position gay_sex gif gloves glowing glowing_genitalia glowing_penis grabbing grabbing_clothing grabbing_from_behind heart-shaped_pupils heart_eyes humanoid incest intraspecies larger_male male male/male male_focus male_only maledom malesub monster open_mouth orange_penis papyrus_(undertale) papysans penetration penetration_from_behind penis pleasure_face realdemdemdmensfw sans_(undertale) sex sex_from_behind sibling_incest siblings simple_background skeleton slideshow small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male tears tears_of_pleasure third-party_edit tongue tongue_out top_papyrus undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background yaoi
2018 2boys 2d anal animated_gif animated_skeleton artist_name big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blue_eyes blue_penis blue_tongue blush bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers clothed clothing crying crying_with_eyes_open digital_media dominant dominant_male duo ectopenis ectotongue edit fontcest from_behind_position gay_sex gif gloves glowing glowing_genitalia glowing_penis grabbing grabbing_clothing grabbing_from_behind heart-shaped_pupils heart_eyes humanoid incest intraspecies larger_male male male/male male_focus male_only maledom malesub monster open_mouth orange_penis papyrus_(undertale) papysans penetration penetration_from_behind penis pleasure_face realdemdemdmensfw sans_(undertale) sex sex_from_behind sibling_incest siblings simple_background skeleton slideshow small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male tears tears_of_pleasure third-party_edit tongue tongue_out top_papyrus undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background yaoi
2018 2boys 2d anal animated_skeleton artist_name big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blue_eyes blue_penis blue_tongue blush bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers clothed clothing crying crying_with_eyes_open digital_media dominant dominant_male duo ectopenis ectotongue edit fontcest from_behind_position gay_sex gloves glowing glowing_genitalia glowing_penis grabbing grabbing_clothing grabbing_from_behind heart-shaped_pupils heart_eyes humanoid incest intraspecies larger_male long_image male male/male male_focus male_only maledom malesub monster open_mouth orange_penis papyrus_(undertale) papysans penetration penetration_from_behind penis pleasure_face realdemdemdmensfw sans_(undertale) sex sex_from_behind sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male tears tears_of_pleasure third-party_edit tongue tongue_out top_papyrus undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background wide_image yaoi
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2018 2boys 2d anal animated_skeleton artist_name big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blue_eyes blue_tongue blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing crying crying_with_eyes_open digital_media dominant dominant_male duo ectotongue fontcest from_behind_position glowing grabbing grabbing_clothing grabbing_from_behind heart-shaped_pupils heart_eyes humanoid incest intraspecies larger_male male male/male male_focus male_only maledom malesub monster open_mouth papyrus_(undertale) papysans penetration penetration_from_behind pleasure_face realdemdemdmensfw sans_(undertale) sex sex_from_behind sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male tears tears_of_pleasure tongue tongue_out top_papyrus undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background yaoi
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2018 2boys 2d anal animated_skeleton artist_name ball_gag big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller bondage bottom_sans bound brother/brother brother_penetrating_brother brothers clothed clothing dated dominant dominant_male duo ectopenis ectotongue fellatio fontcest from_front_position gagged gay_sex grey_background handjob humanoid humping incest intraspecies jacket kabedon larger_male larger_penetrating larger_penetrating_smaller legs_apart licking licking_penis male male/male male_only maledom malesub missionary_position monster mouth_gag multiple_views nude off_shoulder papyrus_(undertale) papysans penetration penetration_from_behind penis realdemdemdmensfw restrained restraints sans_(undertale) sex sex_from_behind sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom solid_color_background submissive submissive_male thrusting thrusting_into_ass tongue tongue_out top_papyrus undead undertale undertale_(series) video_game_character video_games yaoi
!! 1boy 2010s 2017 2d 2d_(artwork) animated_skeleton artist_request blue_blush blush bottom_sans clothed clothing covering_face digital_media_(artwork) disembodied_hand disembodied_hands drooling ectotongue edit edited english_text exclamation_point fluids gif grey_background groping hand_on_face hand_on_own_face hand_under_clothes hand_under_shirt hands heart heart-shaped_pupils hooded_jacket hoodie jacket looking_at_viewer looking_down male male_focus malesub moaning monster nervous partially_colored sans sans_(undertale) sequence sequential shirt_lift shirt_up simple_background skeleton slideshow solo_focus soul soul_sex submissive submissive_male sweat talking_to_viewer text third-party_edit tongue tongue_out topwear twitching uke_sans undead undertale undertale_(series) upper_body video_games
!! 1boy 2010s 2017 2d 2d_(artwork) animated_skeleton artist_request blue_blush blush bottom_sans clothed clothing covering_face digital_media_(artwork) disembodied_hand disembodied_hands drooling ectotongue edit edited english_text exclamation_point fluids gif grey_background groping hand_on_face hand_on_own_face hand_under_clothes hand_under_shirt hands heart heart-shaped_pupils hooded_jacket hoodie jacket looking_at_viewer looking_down male male_focus malesub moaning monster nervous partially_colored sans sans_(undertale) sequence sequential shirt_lift shirt_up simple_background skeleton slideshow solo_focus soul soul_sex submissive submissive_male sweat talking_to_viewer text third-party_edit tongue tongue_out topwear twitching uke_sans undead undertale undertale_(series) upper_body video_games
!! 1boy 2010s 2017 animated_skeleton artist_request blue_blush blush bottom_sans clothed clothing covering_face disembodied_hand disembodied_hands drooling ectotongue edit edited english_text exclamation_point fluids grey_background groping hand_on_face hand_on_own_face hand_under_clothes hand_under_shirt hands heart heart-shaped_pupils hooded_jacket hoodie jacket looking_at_viewer looking_down male male_focus malesub moaning monster nervous partially_colored sans sans_(undertale) sequence sequential shirt_lift shirt_up simple_background skeleton solo_focus soul soul_sex submissive submissive_male sweat talking_to_viewer text third-party_edit tongue tongue_out topwear twitching uke_sans undead undertale undertale_(series) upper_body
!! 1boy 2010s 2017 animated_skeleton artist_request blue_blush blush bottom_sans clothed clothing covering_face disembodied_hand disembodied_hands drooling ectotongue edit edited english_text exclamation_point fluids grey_background groping hand_on_face hand_on_own_face hand_under_clothes hand_under_shirt hands heart heart-shaped_pupils hooded_jacket hoodie jacket looking_at_viewer looking_down male male_focus malesub moaning monster nervous partially_colored sans sans_(undertale) sequence sequential shirt_lift shirt_up simple_background skeleton solo_focus soul soul_sex submissive submissive_male sweat talking_to_viewer text third-party_edit tongue tongue_out topwear twitching uke_sans undead undertale undertale_(series) upper_body
!! 1boy 2010s 2017 animated_skeleton artist_request blue_blush blush bottom_sans clothed clothing covering_face disembodied_hand disembodied_hands drooling ectotongue edit edited english_text exclamation_point fluids grey_background groping hand_on_face hand_on_own_face hand_under_clothes hand_under_shirt hands heart heart-shaped_pupils hooded_jacket hoodie jacket long_image looking_at_viewer looking_down male male_focus malesub moaning monster multiple_images nervous partially_colored sans sans_(undertale) sequence sequential shirt_lift shirt_up simple_background skeleton solo_focus soul soul_sex submissive submissive_male sweat talking_to_viewer tall_image text third-party_edit tongue tongue_out topwear tumblr twitching uke_sans undead undertale undertale_(series) upper_body
!! 1boy 2010s 2017 animated_skeleton artist_request blue_blush blush bottom_sans clothed clothing covering_face disembodied_hand disembodied_hands drooling ectotongue edit edited english_text exclamation_point fluids grey_background groping hand_on_face hand_on_own_face hand_under_clothes hand_under_shirt hands heart heart-shaped_pupils hooded_jacket hoodie jacket long_image looking_at_viewer looking_down male male_focus malesub moaning monster multiple_images nervous partially_colored sans sans_(undertale) sequence sequential shirt_lift shirt_up simple_background skeleton solo_focus soul soul_sex submissive submissive_male sweat talking_to_viewer tall_image text third-party_edit tongue tongue_out topwear tumblr twitching uke_sans undead undertale undertale_(series) upper_body
1boy 2010s 2017 2d 2d_(artwork) animated_skeleton artist_request blue_blush blush bottom_sans clothed clothing covering_face digital_media_(artwork) disembodied_hand disembodied_hands drooling ectotongue english_text grey_background groping hand_on_face hand_on_own_face hands heart hooded_jacket hoodie jacket male male_focus malesub moaning monster partially_colored sans sans_(undertale) sequence sequential shirt_lift shirt_up simple_background skeleton solo_focus soul soul_sex submissive submissive_male sweat text tongue tongue_out topwear uke_sans undead undertale undertale_(series) upper_body video_games
1boy 2010s 2017 2d 2d_(artwork) animated_skeleton artist_request blue_blush blush bottom_sans clothed clothing covering_face digital_media_(artwork) disembodied_hand disembodied_hands drooling ectotongue english_text grey_background groping hand_on_face hand_on_own_face hands heart hooded_jacket hoodie jacket male male_focus malesub moaning monster partially_colored sans sans_(undertale) sequence sequential shirt_lift shirt_up simple_background skeleton solo_focus soul soul_sex submissive submissive_male sweat text tongue tongue_out topwear uke_sans undead undertale undertale_(series) upper_body video_games
1boy 1other 2016 2d all_the_way_through anal animated_skeleton anonymous anthro anthro_on_humanoid arm arms_behind_back big_dom big_dom_small_sub bigger_dom_smaller_sub bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush bondage bottom_sans bottomless bound bound_arms claws digital_media duo ectotongue english_text extreme_fisting extreme_penetration fisting fluids fur furry humanoid humanoid_focus larger_anthro larger_penetrating larger_penetrating_smaller male male/male male_focus malesub monster nude nude_male partially_colored paw penetration restrained restraints ribbon ribbon_bondage sans_(undertale) sequence sequential simple_background size_difference skeleton small_sub small_sub_big_dom smaller_humanoid smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom solo_focus soul soul_sex submissive submissive_male sweat talking_to_another text thesourceofmysins tied_arms tied_up tongue tongue_out topless undead undertale undertale_(series) unseen_character video_game_character video_games white_background
1boy 1other 2016 2d all_the_way_through anal animated_skeleton anonymous anthro anthro_on_humanoid arm arms_behind_back big_dom big_dom_small_sub bigger_dom_smaller_sub bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush bondage bottom_sans bottomless bound bound_arms claws digital_media duo ectotongue english_text extreme_fisting extreme_penetration fisting fluids fur furry humanoid humanoid_focus larger_anthro larger_penetrating larger_penetrating_smaller male male/male male_focus malesub monster nude nude_male partially_colored paw penetration restrained restraints ribbon ribbon_bondage sans_(undertale) sequence sequential simple_background size_difference skeleton small_sub small_sub_big_dom smaller_humanoid smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom solo_focus soul soul_sex submissive submissive_male sweat talking_to_another text thesourceofmysins tied_arms tied_up tongue tongue_out topless undead undertale undertale_(series) unseen_character video_game_character video_games white_background
1:1 1:1_aspect_ratio 1cuntboy 2020 2020s 2d 2d_(artwork) animated_skeleton artist_name blue_blush blue_jacket blue_pussy blue_tongue blush bottom_sans bottomless bottomless_cuntboy clothed clothing cuntboy cuntboy_focus cuntboy_only cuntboysub digital_media_(artwork) ectoplasm ectopussy ectotongue hi_res high_res highres imminent_penetration imminent_sex imminent_tentacle_rape imminent_vaginal jacket legs_apart legs_held_open looking_down male monster octopus_tentacles off_shoulder partially_clothed partially_nude pussy reignbeaux13 sans sans_(undertale) shirt shirt_lift shirt_up simple_background skeleton solo_cuntboy submissive submissive_cuntboy suction_tentacles tentacle tentacle_grab tentacle_in_mouth tentacle_under_clothes tentacles tentacles_around_arms tentacles_around_legs tongue tongue_out topwear two-tone_background uke_sans undead undertale undertale_(series) video_game_character video_games white_border yellow_tentacles
1:1 1:1_aspect_ratio 1cuntboy 2020 2020s 2d 2d_(artwork) animated_skeleton artist_name blue_blush blue_jacket blue_pussy blue_tongue blush bottom_sans bottomless bottomless_cuntboy clothed clothing cuntboy cuntboy_focus cuntboy_only cuntboysub digital_media_(artwork) ectoplasm ectopussy ectotongue hi_res high_res highres imminent_penetration imminent_sex imminent_tentacle_rape imminent_vaginal jacket legs_apart legs_held_open looking_down male monster octopus_tentacles off_shoulder partially_clothed partially_nude pussy reignbeaux13 sans sans_(undertale) shirt shirt_lift shirt_up simple_background skeleton solo_cuntboy submissive submissive_cuntboy suction_tentacles tentacle tentacle_grab tentacle_in_mouth tentacle_under_clothes tentacles tentacles_around_arms tentacles_around_legs tongue tongue_out topwear two-tone_background uke_sans undead undertale undertale_(series) video_game_character video_games white_border yellow_tentacles
2boys 2d 2d_(artwork) animated_skeleton artist_request blue_blush blue_tongue blush bodily_fluids bottom_sans clothing digital_media_(artwork) disembodied_penis ectotongue fangs fellatio fluids genitals grey_background licking licking_penis male male/male male_only monster oral orange_penis penis penis_grab sans sans_(undertale) sex simple_background skeleton solo_focus tongue uke_sans undead undertale undertale_(series) unseen_character unseen_male unseen_male_face upper_body video_games yaoi
2boys 2d 2d_(artwork) animated_skeleton artist_request blue_blush blue_tongue blush bodily_fluids bottom_sans clothing digital_media_(artwork) disembodied_penis ectotongue fangs fellatio fluids genitals grey_background licking licking_penis male male/male male_only monster oral orange_penis penis penis_grab sans sans_(undertale) sex simple_background skeleton solo_focus tongue uke_sans undead undertale undertale_(series) unseen_character unseen_male unseen_male_face upper_body video_games yaoi
2022 2boys 2d animated_skeleton arms_around_another arms_around_another's_neck artist_name artist_watermark biting biting_shoulder bottom_sans bottomwear brother/brother brothers clothed clothing digital_media drooling duo ectotongue empath__life fontcest grey_background hand_in_pants hand_under_clothes hands_on_another's_chest hands_on_chest humanoid incest intraspecies kissing making_out male male/male male_only monochrome monster monster_boy pants papyrus_(undertale) papysans partially_clothed partially_nude saliva saliva_on_tongue saliva_trail sans_(undertale) sequential sibling_incest siblings simple_background skeleton taking_off_clothes teeth tel_a_friend tongue top_papyrus topless topless_male undead undertale undertale_(series) undressing video_game_character video_games watermark yaoi
2022 2boys 2d animated_skeleton arms_around_another arms_around_another's_neck artist_name artist_watermark biting biting_shoulder bottom_sans bottomwear brother/brother brothers clothed clothing digital_media drooling duo ectotongue empath__life fontcest grey_background hand_in_pants hand_under_clothes hands_on_another's_chest hands_on_chest humanoid incest intraspecies kissing making_out male male/male male_only monochrome monster monster_boy pants papyrus_(undertale) papysans partially_clothed partially_nude saliva saliva_on_tongue saliva_trail sans_(undertale) sequential sibling_incest siblings simple_background skeleton taking_off_clothes teeth tel_a_friend tongue top_papyrus topless topless_male undead undertale undertale_(series) undressing video_game_character video_games watermark yaoi
... 2022 2boys 2d animated_skeleton artist_name artist_watermark biting biting_shoulder bottom_sans bottomwear brother/brother brother_and_brother brothers cape clothed clothing dialog dialogue digital_media duo ectotongue empath__life english_text fontcest gloves grey_background hands_around_neck hands_on_another's_shoulders hands_on_shoulders hooded_jacket hoodie humanoid incest intraspecies jacket kissing making_out male male/male male_only monochrome monster monster_boy pants papyrus_(undertale) papysans partially_clothed partially_clothed_male partially_nude saliva saliva_on_tongue saliva_trail sans_(undertale) scarf sequential sibling_incest siblings simple_background skeleton taking_off_clothes teeth tel_a_friend text tongue top_papyrus topless topless_male undead undertale undertale_(series) undressing undressing_another undressing_partner video_game_character video_games watermark yaoi
... 2022 2boys 2d animated_skeleton artist_name artist_watermark biting biting_shoulder bottom_sans bottomwear brother/brother brother_and_brother brothers cape clothed clothing dialog dialogue digital_media duo ectotongue empath__life english_text fontcest gloves grey_background hands_around_neck hands_on_another's_shoulders hands_on_shoulders hooded_jacket hoodie humanoid incest intraspecies jacket kissing making_out male male/male male_only monochrome monster monster_boy pants papyrus_(undertale) papysans partially_clothed partially_clothed_male partially_nude saliva saliva_on_tongue saliva_trail sans_(undertale) scarf sequential sibling_incest siblings simple_background skeleton taking_off_clothes teeth tel_a_friend text tongue top_papyrus topless topless_male undead undertale undertale_(series) undressing undressing_another undressing_partner video_game_character video_games watermark yaoi