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1boy 2018 2d all_fours animated_skeleton artist_request blue_blush blush bodily_fluids dark digital_media fluids glowing humanoid implied_object_insertion male male_focus male_only monster sans_(undertale) skeleton sketch solo solo_male tears top-down_bottom-up undead undertale undertale_(series)

1boy 2018 2d all_fours animated_skeleton artist_request blue_blush blush bodily_fluids dark digital_media fluids glowing humanoid implied_object_insertion male male_focus male_only monster sans_(undertale) skeleton sketch solo solo_male tears top-down_bottom-up undead undertale undertale_(series)

all_foursanimated_skeleton

1boy 2023 2d absurd_res absurdres ahegao animated_skeleton black_censor_bar blue_penis blue_tongue blush bottom_sans bound censored_penis cum cum_while_penetrated cumshot digital_media ectopenis ectoplasm ectotongue ejaculation fluids gloves gloves_only green_background green_tentacles japanese_text konoha6 large_filesize legs_apart legs_forced_open legs_held_open monster monster_boy nude penis sans_(undertale) skeleton socks socks_only solo submissive sweat tentacle tentacle_on_male tentacle_rape tentacle_sex tentaclejob tentacles_around_arms tentacles_around_legs text tongue tongue_out trembling undead undertale undertale_(series) urethral variant_set video_games

1boy 2023 2d absurd_res absurdres ahegao animated_skeleton black_censor_bar blue_penis blue_tongue blush bottom_sans bound censored_penis cum cum_while_penetrated cumshot digital_media ectopenis ectoplasm ectotongue ejaculation fluids gloves gloves_only green_background green_tentacles japanese_text konoha6 large_filesize legs_apart legs_forced_open legs_held_open monster monster_boy nude penis sans_(undertale) skeleton socks socks_only solo submissive sweat tentacle tentacle_on_male tentacle_rape tentacle_sex tentaclejob tentacles_around_arms tentacles_around_legs text tongue tongue_out trembling undead undertale undertale_(series) urethral variant_set video_games

absurd_resabsurdres

1boy 2023 2d absurd_res absurdres animated_skeleton black_censor_bar blue_penis blush bottom_sans bound censored_penis digital_media ectopenis ectoplasm fluids gloves gloves_only green_background green_tentacles japanese_text konoha6 large_filesize legs_apart legs_forced_open legs_held_open monster monster_boy nude penis sans_(undertale) skeleton socks socks_only solo_male submissive sweat teeth tentacle tentacle_on_male tentacle_rape tentacle_sex tentacles_around_arms tentacles_around_legs text trembling undead undertale undertale_(series) variant_set video_games

1boy 2023 2d absurd_res absurdres animated_skeleton black_censor_bar blue_penis blush bottom_sans bound censored_penis digital_media ectopenis ectoplasm fluids gloves gloves_only green_background green_tentacles japanese_text konoha6 large_filesize legs_apart legs_forced_open legs_held_open monster monster_boy nude penis sans_(undertale) skeleton socks socks_only solo_male submissive sweat teeth tentacle tentacle_on_male tentacle_rape tentacle_sex tentacles_around_arms tentacles_around_legs text trembling undead undertale undertale_(series) variant_set video_games

absurd_resabsurdres

1boy 2020s 2023 2d 2d_(artwork) anthro anthro_only asgore_dreemurr attempted_autofellatio balls bara beard big_penis black_and_white bodily_fluids boss_monster bovid caprine digital_media_(artwork) dilf english_text erection facial_hair fluids from_below fur furaffinity furry furry_male furry_only genital_fluids genitals hair high_res horn hyponova long_ears male male_only mammal mature mature_anthro mature_male monochrome musclegut nude open_mouth penis penis_focus precum pubes solo_anthro solo_male text third-party_source tongue tongue_out twitter undertale undertale_(series) vein veiny_penis video_game_character video_games

1boy 2020s 2023 2d 2d_(artwork) anthro anthro_only asgore_dreemurr attempted_autofellatio balls bara beard big_penis black_and_white bodily_fluids boss_monster bovid caprine digital_media_(artwork) dilf english_text erection facial_hair fluids from_below fur furaffinity furry furry_male furry_only genital_fluids genitals hair high_res horn hyponova long_ears male male_only mammal mature mature_anthro mature_male monochrome musclegut nude open_mouth penis penis_focus precum pubes solo_anthro solo_male text third-party_source tongue tongue_out twitter undertale undertale_(series) vein veiny_penis video_game_character video_games

anthroanthro_only

2_girls 2d 2girls abs after_sex alternate_version_available animal_humanoid anthro anthro_only anus areola barefoot barely_visible_anus beach big_breasts blue_areola blue_body blue_breasts blue_clitoris blue_nipples blue_pussy blue_skin bodily_fluids breasts breasts_apart brown_hair claws clitoral_hood clitoris colored_nails cum cum_in_pussy cum_inside cum_on_body cum_on_breasts cum_on_face dark_hair deltarune digital_media duo ear_fins eyepatch eyewear fangs feet female female_abs female_anthro female_only female_pubic_hair fins fish fish_girl fluids from_above genital_fluids genitals head_fins high_ponytail itchyears lizard lizard_girl lizard_tail long_hair lying marine monster monster_girl muscle muscular muscular_anthro muscular_female nails navel nipples non-mammal_breasts non-mammal_nipples nude on_back palm_tree plant ponytail pubes pubic_hair purple_areola purple_areolae purple_body purple_breasts purple_clitoris purple_nipples purple_pussy purple_skin pussy raised_arms red_hair red_nails red_pubic_hair reptile reptile_girl reptile_tail sand scalie seaside sharp_teeth slit_pupils susie_(deltarune) susie_(light_world_form)_(deltarune) tail teeth third-party_source toe_claws tree undertale undertale_(series) undyne variant_set video_game_character video_games yellow_sclera yellow_teeth

2_girls 2d 2girls abs after_sex alternate_version_available animal_humanoid anthro anthro_only anus areola barefoot barely_visible_anus beach big_breasts blue_areola blue_body blue_breasts blue_clitoris blue_nipples blue_pussy blue_skin bodily_fluids breasts breasts_apart brown_hair claws clitoral_hood clitoris colored_nails cum cum_in_pussy cum_inside cum_on_body cum_on_breasts cum_on_face dark_hair deltarune digital_media duo ear_fins eyepatch eyewear fangs feet female female_abs female_anthro female_only female_pubic_hair fins fish fish_girl fluids from_above genital_fluids genitals head_fins high_ponytail itchyears lizard lizard_girl lizard_tail long_hair lying marine monster monster_girl muscle muscular muscular_anthro muscular_female nails navel nipples non-mammal_breasts non-mammal_nipples nude on_back palm_tree plant ponytail pubes pubic_hair purple_areola purple_areolae purple_body purple_breasts purple_clitoris purple_nipples purple_pussy purple_skin pussy raised_arms red_hair red_nails red_pubic_hair reptile reptile_girl reptile_tail sand scalie seaside sharp_teeth slit_pupils susie_(deltarune) susie_(light_world_form)_(deltarune) tail teeth third-party_source toe_claws tree undertale undertale_(series) undyne variant_set video_game_character video_games yellow_sclera yellow_teeth

1boy 2d alternate_form black_background blush blush_lines bodily_fluids claws colored_sclera digital_media extra_eyes flowey_(undertale) fluids green_eyes male male_only monster monster_boy multiple_eyes nectar nnybunny photoshop_flowey plant pollen red_claws red_sclera simple_background solo_male undertale undertale_(series) unusual_genitalia

1boy 2d alternate_form black_background blush blush_lines bodily_fluids claws colored_sclera digital_media extra_eyes flowey_(undertale) fluids green_eyes male male_only monster monster_boy multiple_eyes nectar nnybunny photoshop_flowey plant pollen red_claws red_sclera simple_background solo_male undertale undertale_(series) unusual_genitalia

alternate_formblack_background

1boy 1boy1girl 1girl 2022 2d anonymous anonymous_male blue_body blue_hair blue_skin bodily_fluids cum cum_in_pussy cum_inside deltarune digital_media faceless_male female_human fluids gopindon hair_over_eyes hetero human kris_(dark_world_form)_(deltarune) kris_(deltarune) kris_(female)_(deltarune) male male/female mating_press penetration sex short_hair spoken_heart text undertale_(series) unseen_male_face vaginal vaginal_penetration vaginal_sex variant_set video_game_character video_games white_background

1boy 1boy1girl 1girl 2022 2d anonymous anonymous_male blue_body blue_hair blue_skin bodily_fluids cum cum_in_pussy cum_inside deltarune digital_media faceless_male female_human fluids gopindon hair_over_eyes hetero human kris_(dark_world_form)_(deltarune) kris_(deltarune) kris_(female)_(deltarune) male male/female mating_press penetration sex short_hair spoken_heart text undertale_(series) unseen_male_face vaginal vaginal_penetration vaginal_sex variant_set video_game_character video_games white_background

anonymousanonymous_male

1boy 1boy1girl 1girl 2022 2d anonymous anonymous_male blue_body blue_hair blue_skin bodily_fluids deltarune digital_media faceless_male female_human fluids gopindon hair_over_eyes hetero human kris_(dark_world_form)_(deltarune) kris_(deltarune) kris_(female)_(deltarune) male male/female mating_press penetration sex short_hair spoken_heart text undertale_(series) unseen_male_face vaginal vaginal_penetration vaginal_sex variant_set video_game_character video_games white_background

1boy 1boy1girl 1girl 2022 2d anonymous anonymous_male blue_body blue_hair blue_skin bodily_fluids deltarune digital_media faceless_male female_human fluids gopindon hair_over_eyes hetero human kris_(dark_world_form)_(deltarune) kris_(deltarune) kris_(female)_(deltarune) male male/female mating_press penetration sex short_hair spoken_heart text undertale_(series) unseen_male_face vaginal vaginal_penetration vaginal_sex variant_set video_game_character video_games white_background

anonymousanonymous_male

1boy 1cuntboy 2021 2d abosinsin animated_skeleton ass_spanking bad_id bad_twitter_id blue_blush blue_eyes blue_hoodie blue_jacket blue_tongue blush bodily_fluids bottom_sans bottomless brother/brother brothers butt_spanking cuntboy cuntboy_focus cuntboysub digital_media dominant dominant_male duo ectoplasm ectopussy english_text fluids fontcest gloves grabbing_sheets gripping_sheets hand heart-shaped_pupils heart_eyes hooded_jacket hoodie humanoid inactive_account incest intraspecies jacket kneeling looking_back male maledom monster papyrus_(undertale) papysans pink_socks punishment pussy red_gloves sans_(undertale) sibling_incest siblings skeleton socks solo_focus spank_marks spanking spanking_ass spanking_butt submissive submissive_cuntboy sweat text top_papyrus twitter_username undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games visible_breath white_background yaoi

1boy 1cuntboy 2021 2d abosinsin animated_skeleton ass_spanking bad_id bad_twitter_id blue_blush blue_eyes blue_hoodie blue_jacket blue_tongue blush bodily_fluids bottom_sans bottomless brother/brother brothers butt_spanking cuntboy cuntboy_focus cuntboysub digital_media dominant dominant_male duo ectoplasm ectopussy english_text fluids fontcest gloves grabbing_sheets gripping_sheets hand heart-shaped_pupils heart_eyes hooded_jacket hoodie humanoid inactive_account incest intraspecies jacket kneeling looking_back male maledom monster papyrus_(undertale) papysans pink_socks punishment pussy red_gloves sans_(undertale) sibling_incest siblings skeleton socks solo_focus spank_marks spanking spanking_ass spanking_butt submissive submissive_cuntboy sweat text top_papyrus twitter_username undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games visible_breath white_background yaoi

abosinsinanimated_skeleton

1boy 2d animated_skeleton ass ass_up blue_blush blue_collar blush bodily_fluids bottom_sans bottomless bound_wrists collar collar_and_leash digital_media filthysmashpeach fluids humanoid kneeling leash leash_and_collar looking_at_viewer male male_only monochrome monster one_eye_closed partially_clothed partially_colored sans_(undertale) skeleton solo solo_male submissive tied_wrists top-down_bottom-up undead undertale undertale_(series)

1boy 2d animated_skeleton ass ass_up blue_blush blue_collar blush bodily_fluids bottom_sans bottomless bound_wrists collar collar_and_leash digital_media filthysmashpeach fluids humanoid kneeling leash leash_and_collar looking_at_viewer male male_only monochrome monster one_eye_closed partially_clothed partially_colored sans_(undertale) skeleton solo solo_male submissive tied_wrists top-down_bottom-up undead undertale undertale_(series)

animated_skeletonass

1boy 2d animated_skeleton blue_blush blue_eyes blue_penis blush bodily_fluids bottomless bottomless_male digital_media ectopenis fluids genital_fluids genitals grey_background humanoid kneel male male_focus male_only monster monster_boy penis sans_(undertale) shirt_pulled_up shirt_up simple_background skeleton sketch sniggysmut socks solo_male sweat undead undertale undertale_(series) video_game_character video_games

1boy 2d animated_skeleton blue_blush blue_eyes blue_penis blush bodily_fluids bottomless bottomless_male digital_media ectopenis fluids genital_fluids genitals grey_background humanoid kneel male male_focus male_only monster monster_boy penis sans_(undertale) shirt_pulled_up shirt_up simple_background skeleton sketch sniggysmut socks solo_male sweat undead undertale undertale_(series) video_game_character video_games

animated_skeletonblue_blush

1boy 2d ambiguous_fluids animated_skeleton artist_request bottom_sans clothed digital_media fluids fully_clothed hood hooded_jacket humanoid jacket legs_up lying male male_focus monster on_stomach sans_(undertale) simple_background skeleton solo undead undertale undertale_(series) white_background

1boy 2d ambiguous_fluids animated_skeleton artist_request bottom_sans clothed digital_media fluids fully_clothed hood hooded_jacket humanoid jacket legs_up lying male male_focus monster on_stomach sans_(undertale) simple_background skeleton solo undead undertale undertale_(series) white_background

ambiguous_fluidsanimated_skeleton

2023 2boys 2d anal animated_skeleton bodily_fluids boots bottom_sans brother/brother brother_penetrating_brother brothers digital_media duo fluids fontcest footwear gay grabbing_sheets gripping_sheets humanoid incest intraspecies jepr0d lying male male/male male_penetrating missionary_position monster monster_boy on_back papyrus_(undertale) papysans penetration pillow red_boots sans_(undertale) sex shoes sibling_incest siblings simple_background skeleton socks teeth top_papyrus undead undertale undertale_(series) white_background yaoi

2023 2boys 2d anal animated_skeleton bodily_fluids boots bottom_sans brother/brother brother_penetrating_brother brothers digital_media duo fluids fontcest footwear gay grabbing_sheets gripping_sheets humanoid incest intraspecies jepr0d lying male male/male male_penetrating missionary_position monster monster_boy on_back papyrus_(undertale) papysans penetration pillow red_boots sans_(undertale) sex shoes sibling_incest siblings simple_background skeleton socks teeth top_papyrus undead undertale undertale_(series) white_background yaoi

analanimated_skeleton

1:1 1:1_aspect_ratio 2015 2boys 2d alternate_version_available animated_skeleton blue_blush blue_penis blush bodily_fluids bottom_sans bound bound_arms clothed clothing digital_media drooling duo ectopenis flowans flower flowey_(undertale) flowsans fluids genitals goopynoms grey_background humanoid interspecies jacket male male/male male_only malesub monochrome monster monster_boy off_shoulder pants_down pants_pulled_down penis plant plant_tentacles sans_(undertale) sex simple_background skeleton submissive submissive_male tentacle tentacle_around_penis tentacles_on_male top_flowey undead undertale undertale_(series) video_game_character video_games vine_tentacles vinejob vines yaoi yellow_flower

1:1 1:1_aspect_ratio 2015 2boys 2d alternate_version_available animated_skeleton blue_blush blue_penis blush bodily_fluids bottom_sans bound bound_arms clothed clothing digital_media drooling duo ectopenis flowans flower flowey_(undertale) flowsans fluids genitals goopynoms grey_background humanoid interspecies jacket male male/male male_only malesub monochrome monster monster_boy off_shoulder pants_down pants_pulled_down penis plant plant_tentacles sans_(undertale) sex simple_background skeleton submissive submissive_male tentacle tentacle_around_penis tentacles_on_male top_flowey undead undertale undertale_(series) video_game_character video_games vine_tentacles vinejob vines yaoi yellow_flower

alternate_version_availableanimated_skeleton

1:1 1:1_aspect_ratio 2015 2boys 2d alternate_version_available animated_skeleton blue_blush blush bodily_fluids bottom_sans bound bound_arms clothed clothing digital_media drooling duo flowans flower flowey_(undertale) flowsans fluids goopynoms grey_background humanoid interspecies jacket male male/male male_only malesub monochrome monster monster_boy off_shoulder pants_down pants_pulled_down plant plant_tentacles sans_(undertale) sex simple_background skeleton submissive submissive_male tentacle tentacle_on_male tentacles_on_male top_flowey undead undertale undertale_(series) video_game_character video_games vine_tentacles vines yaoi yellow_flower

1:1 1:1_aspect_ratio 2015 2boys 2d alternate_version_available animated_skeleton blue_blush blush bodily_fluids bottom_sans bound bound_arms clothed clothing digital_media drooling duo flowans flower flowey_(undertale) flowsans fluids goopynoms grey_background humanoid interspecies jacket male male/male male_only malesub monochrome monster monster_boy off_shoulder pants_down pants_pulled_down plant plant_tentacles sans_(undertale) sex simple_background skeleton submissive submissive_male tentacle tentacle_on_male tentacles_on_male top_flowey undead undertale undertale_(series) video_game_character video_games vine_tentacles vines yaoi yellow_flower

alternate_version_availableanimated_skeleton

2022 2boys 2d anal animated_skeleton artist_name big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_tongue bodily_fluids boner_blossom bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers crying crying_with_eyes_open digital_media drooling duo ectopenis ectoplasm english_text fluids fontcest gay heart-shaped_pupils humanoid incest intraspecies larger_male larger_penetrating male male/male male_only male_penetrated male_penetrating male_penetrating_male missionary_position monster monster_boy non-con non-consensual noncon nonconsensual nude nude_male orange_penis papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penis questionable_consent rape safeword sans_(undertale) sex sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom speech_bubble sweat tears text text_bubble thrusting tongue top_papyrus twitter_username undead undertale undertale_(series) video_game_character video_games yaoi

2022 2boys 2d anal animated_skeleton artist_name big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_tongue bodily_fluids boner_blossom bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers crying crying_with_eyes_open digital_media drooling duo ectopenis ectoplasm english_text fluids fontcest gay heart-shaped_pupils humanoid incest intraspecies larger_male larger_penetrating male male/male male_only male_penetrated male_penetrating male_penetrating_male missionary_position monster monster_boy non-con non-consensual noncon nonconsensual nude nude_male orange_penis papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penis questionable_consent rape safeword sans_(undertale) sex sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom speech_bubble sweat tears text text_bubble thrusting tongue top_papyrus twitter_username undead undertale undertale_(series) video_game_character video_games yaoi

analanimated_skeleton

2023 2d animated_skeleton arms_behind_back blue_eyes bodily_fluids bondage bottom_sans bound_arms bound_wrists completely_nude crying crying_with_eyes_open edit egg_vibrator english_text fluids gagfan3 grey_background hand hands_behind_back humanoid implied_incest intraspecies kneel kneeling male male_focus monochrome monster monster_boy nude onomatopoeia partially_colored sans_(undertale) sex_toy simple_background skeleton solid_color_background solo_focus soul soul_sex sweat taped_mouth tears text third-party_edit thought_bubble tied_arms tied_up tired_but_horny_(artist) undead undertale undertale_(series) unseen_character vibrator video_game_character video_games yaoi

2023 2d animated_skeleton arms_behind_back blue_eyes bodily_fluids bondage bottom_sans bound_arms bound_wrists completely_nude crying crying_with_eyes_open edit egg_vibrator english_text fluids gagfan3 grey_background hand hands_behind_back humanoid implied_incest intraspecies kneel kneeling male male_focus monochrome monster monster_boy nude onomatopoeia partially_colored sans_(undertale) sex_toy simple_background skeleton solid_color_background solo_focus soul soul_sex sweat taped_mouth tears text third-party_edit thought_bubble tied_arms tied_up tired_but_horny_(artist) undead undertale undertale_(series) unseen_character vibrator video_game_character video_games yaoi

animated_skeletonarms_behind_back

1girl 2boys 2d 2d_(artwork) anonymous anonymous_male ass big_ass big_testicles boyfriend_(friday_night_funkin) bubble_butt cum cum_in_ass cum_inside cumming digital_media_(artwork) eks-out female_supporting_yaoi femboy femboyfriend_(friday_night_funkin) fluids friday_night_funkin fujoshi genital_fluids girlfriend_(friday_night_funkin) girly huge_ass kissing kissing_while_penetrated male_focus mob_face open_mouth_kiss penetration sequence sequential sex solo_focus testicles third-party_source tongue_licking tongue_out twitter video_game_character video_games wide_hips yaoi

1girl 2boys 2d 2d_(artwork) anonymous anonymous_male ass big_ass big_testicles boyfriend_(friday_night_funkin) bubble_butt cum cum_in_ass cum_inside cumming digital_media_(artwork) eks-out female_supporting_yaoi femboy femboyfriend_(friday_night_funkin) fluids friday_night_funkin fujoshi genital_fluids girlfriend_(friday_night_funkin) girly huge_ass kissing kissing_while_penetrated male_focus mob_face open_mouth_kiss penetration sequence sequential sex solo_focus testicles third-party_source tongue_licking tongue_out twitter video_game_character video_games wide_hips yaoi

anonymousanonymous_male

1boy 2018 2d anal animated_skeleton anus blue_blush blue_hood blue_jacket blush bottom_sans bottomless digital_media drooling ectoplasm egg_vibrator fluids heart heki_(miss60250) hooded_jacket hoodie humanoid jacket looking_down male monster monster_boy sans_(undertale) sex_toy skeleton solo solo_male spread_legs submissive undead undertale undertale_(series) vibrator white_background

1boy 2018 2d anal animated_skeleton anus blue_blush blue_hood blue_jacket blush bottom_sans bottomless digital_media drooling ectoplasm egg_vibrator fluids heart heki_(miss60250) hooded_jacket hoodie humanoid jacket looking_down male monster monster_boy sans_(undertale) sex_toy skeleton solo solo_male spread_legs submissive undead undertale undertale_(series) vibrator white_background

analanimated_skeleton

1boy 1other 2022 2d ambiguous_fluids animated_skeleton bashou_tokage blue_blush blue_hoodie blue_jacket blue_popsicle blue_tongue blush bottom_sans clothed digital_media fluids hand hooded_jacket hoodie humanoid jacket male male_focus monster popsicle sans_(undertale) sexually_suggestive skeleton solo_focus submissive suggestive suggestive_fluid suggestive_food tongue tongue_out undead undertale undertale_(series) upper_body white_background

1boy 1other 2022 2d ambiguous_fluids animated_skeleton bashou_tokage blue_blush blue_hoodie blue_jacket blue_popsicle blue_tongue blush bottom_sans clothed digital_media fluids hand hooded_jacket hoodie humanoid jacket male male_focus monster popsicle sans_(undertale) sexually_suggestive skeleton solo_focus submissive suggestive suggestive_fluid suggestive_food tongue tongue_out undead undertale undertale_(series) upper_body white_background

ambiguous_fluidsanimated_skeleton

1boy 1other 2019 2d amalgamate_(undertale) animated_skeleton ass ass_grab canid canine clothed clothed_male commission dark_background digital_media dog duo endogeny feral fluids gradient_background humanoid larger_feral licking lying male melle-d monster monster_boy muscle muscular on_back onomatopoeia paws pillow sans_(undertale) size_difference skeleton smaller_humanoid smaller_male undead undertale undertale_(series) video_game_character video_games

1boy 1other 2019 2d amalgamate_(undertale) animated_skeleton ass ass_grab canid canine clothed clothed_male commission dark_background digital_media dog duo endogeny feral fluids gradient_background humanoid larger_feral licking lying male melle-d monster monster_boy muscle muscular on_back onomatopoeia paws pillow sans_(undertale) size_difference skeleton smaller_humanoid smaller_male undead undertale undertale_(series) video_game_character video_games

amalgamate_(undertale)animated_skeleton

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2022 2boys 2d abosinsin anal anal_penetration anal_sex animated_skeleton arms_grab bad_id bad_twitter_id big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller black_legwear blue_hoodie blue_penis blush bodily_fluids bottom_sans bouncing_penis brother/brother brother_penetrating_brother brothers clothed dialogue digital_media dirty_talk duo ectopenis english_text erect_while_penetrated fluids fontcest from_behind_position fully_clothed gloves grabbing_from_behind head_out_of_frame holding_arms hoodie humanoid inactive_account incest intraspecies kneeling larger_dom larger_male larger_penetrating larger_penetrating_smaller leaking_cum legwear male male/male male_focus male_only male_out_of_frame male_penetrated male_penetrating male_penetrating_male maledom moan moaning monster monster_boy motion_lines onomatopoeia papyrus_(undertale) papysans penetration penetration_from_behind penetration_through_clothes penis penis_through_clothing pounding prison_guard_position profanity red_gloves sans_(undertale) sex sex_from_behind sex_through_clothes sex_through_clothing sibling_incest siblings size_difference skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smooth_penis speech_bubble sweat text thought_bubble thrusting top_papyrus undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background yaoi

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animatedanimated_gif

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