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1girl 2boys 2d alphys animated animated_gif animated_skeleton anthro basho_lizard blue_tongue bottom_sans crying digital_media dinosaur dinosaur_girl drooling floor fluids from_above gif glasses hoodie humanoid large_filesize lizard lizard_girl lizard_tail male male_focus malesub monster monster_boy monster_girl papyrus_(undertale) penetration red_tentacles reptile reptile_girl reptile_tail sans_(undertale) scalie scalie_female scared sex shocked siblings skeleton solo_focus submissive submissive_male tail tears tentacle tentacle_on_male tentacle_rape tentacle_sex tentacles_around_legs tongue trio undead undertale undertale_(series) video_game_character video_games wide_eyed yellow_body yellow_skin
1girl 2boys 2d alphys animated animated_gif animated_skeleton anthro basho_lizard blue_tongue bottom_sans crying digital_media dinosaur dinosaur_girl drooling floor fluids from_above gif glasses hoodie humanoid large_filesize lizard lizard_girl lizard_tail male male_focus malesub monster monster_boy monster_girl papyrus_(undertale) penetration red_tentacles reptile reptile_girl reptile_tail sans_(undertale) scalie scalie_female scared sex shocked siblings skeleton solo_focus submissive submissive_male tail tears tentacle tentacle_on_male tentacle_rape tentacle_sex tentacles_around_legs tongue trio undead undertale undertale_(series) video_game_character video_games wide_eyed yellow_body yellow_skin
1boy 2016 anal anal_penetration anthro anus asriel_dreemurr asriel_dreemurr_(god_of_hyperdeath) ass boss_monster bottom_asriel caprine clenched_teeth crackers cum cum_in_ass cum_inside digital_media_(artwork) erection feet_out_of_frame fluffy_tail fur furry genital_fluids genitals goat green_eyes horn humanoid_penis long_ears looking_at_viewer male male_anthro male_focus male_only mammal monster nude nude_anthro nude_male penetration penis precum purple_background sex simple_background solo_male teeth tentacle tentacle_on_male tentacle_sex tentacles_around_arms tentacles_on_male testicles tuft uke_asriel undertale undertale_(series) video_games white_body white_fur
1boy 2016 anal anal_penetration anthro anus asriel_dreemurr asriel_dreemurr_(god_of_hyperdeath) ass boss_monster bottom_asriel caprine clenched_teeth crackers cum cum_in_ass cum_inside digital_media_(artwork) erection feet_out_of_frame fluffy_tail fur furry genital_fluids genitals goat green_eyes horn humanoid_penis long_ears looking_at_viewer male male_anthro male_focus male_only mammal monster nude nude_anthro nude_male penetration penis precum purple_background sex simple_background solo_male teeth tentacle tentacle_on_male tentacle_sex tentacles_around_arms tentacles_on_male testicles tuft uke_asriel undertale undertale_(series) video_games white_body white_fur
1boy 1girl 2d 2d_(artwork) blue_hair blush boyfriend_(friday_night_funkin) clothed cyan_hair digital_media_(artwork) enigi09 friday_night_funkin girlfriend_(friday_night_funkin) holding_microphone male male_focus microphone questionable_consent speaker spoken_heart surprise_sex tentacle tentacle_on_male tentacles third-party_source video_games watching white_background
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2boys 2d 2d_(artwork) animated_skeleton bottom_sans bound clothed convenient_censoring convenient_censorship digital_media_(artwork) duo flowans flower flowey_the_flower flowsans gay implied_penetration interspecies korean_text male male/male male_only monochrome monster monster_boy mouth_forced_open plant plant_tentacle restrained sans sans_(undertale) seme_flowey simple_background skeleton soul soul_sex submissive tentacle tentacle_on_male tentacle_rape tentacle_sex tentacles_around_legs tentacles_on_male text top_flowey uke_sans undead undertale undertale_(series) ut-2828282928 video_game_character video_games vine_tentacles vines white_background yaoi
2boys 2d 2d_(artwork) animated_skeleton bottom_sans bound clothed convenient_censoring convenient_censorship digital_media_(artwork) duo flowans flower flowey_the_flower flowsans gay implied_penetration interspecies korean_text male male/male male_only monochrome monster monster_boy mouth_forced_open plant plant_tentacle restrained sans sans_(undertale) seme_flowey simple_background skeleton soul soul_sex submissive tentacle tentacle_on_male tentacle_rape tentacle_sex tentacles_around_legs tentacles_on_male text top_flowey uke_sans undead undertale undertale_(series) ut-2828282928 video_game_character video_games vine_tentacles vines white_background yaoi
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2boys 2d 2d_(artwork) animated_skeleton bottom_sans bound clothed digital_media_(artwork) duo flowans flower flowey_the_flower flowsans gay interspecies looking_at_another looking_at_each_other looking_at_partner male male/male male_only monochrome monster monster_boy mouth_gag plant plant_tentacle restrained sans sans_(undertale) seme_flowey simple_background skeleton submissive tentacle tentacle_on_male tentacles_on_male top_flowey uke_sans undead undertale undertale_(series) ut-2828282928 video_game_character video_games vine_tentacles vines white_background yaoi
2022 2boys 2d alternate_version_available animated_skeleton basho_lizard bottom_sans clothed digital_media duo flowans flower flowey_the_flower flowsans humanoid interspecies male male/male male_only monster monster_boy plant plant_tentacle sans_(undertale) sequential skeleton soul_sex submissive sweat tentacle tentacle_on_male tentacles_under_clothes top_flowey undead undertale undertale_(series) variant_set video_game_character video_games vine_tentacles vines white_background yaoi yellow_flower
2022 2boys 2d alternate_version_available animated_skeleton basho_lizard bottom_sans clothed digital_media duo flowans flower flowey_the_flower flowsans humanoid interspecies male male/male male_only monster monster_boy plant plant_tentacle sans_(undertale) sequential skeleton soul_sex submissive sweat tentacle tentacle_on_male tentacles_under_clothes top_flowey undead undertale undertale_(series) variant_set video_game_character video_games vine_tentacles vines white_background yaoi yellow_flower
2022 2boys 2d alternate_version_available animated_skeleton basho_lizard blue_tongue bodily_fluids bottom_sans clothed crying digital_media duo ectotongue flowans flower flowey_the_flower flowsans fluids humanoid interspecies male male/male male_only monster monster_boy plant plant_tentacle sans_(undertale) sequential skeleton soul_sex submissive sweat tears tentacle tentacle_on_male tentacles_under_clothes tongue tongue_out top_flowey trembling twitching undead undertale undertale_(series) variant_set video_game_character video_games vine_tentacles vines white_background yaoi yellow_flower
2022 2boys 2d alternate_version_available animated_skeleton basho_lizard blue_tongue bodily_fluids bottom_sans clothed crying digital_media duo ectotongue flowans flower flowey_the_flower flowsans fluids humanoid interspecies male male/male male_only monster monster_boy plant plant_tentacle sans_(undertale) sequential skeleton soul_sex submissive sweat tears tentacle tentacle_on_male tentacles_under_clothes tongue tongue_out top_flowey trembling twitching undead undertale undertale_(series) variant_set video_game_character video_games vine_tentacles vines white_background yaoi yellow_flower
2boys 2d 2d_(artwork) against_wall animated_skeleton blue_blush blue_penis blush bottom_sans clothed clothing digital_media_(artwork) duo ectopenis flowans flower flowey_the_flower flowsans grey_background imminent_sex interspecies male male/male male_only monster monster_boy penis plant plant_penis plant_tentacle sans sans_(undertale) seme_flowey sex simple_background skeleton submissive sweat tentacle tentacle_around_penis tentacle_on_male tentaclejob top_flowey uke_sans undead undertale undertale_(series) unknown_artist video_game_character video_games vine_tentacles vinejob vines yaoi yellow_flower
2boys 2d 2d_(artwork) against_wall animated_skeleton blue_blush blue_penis blush bottom_sans clothed clothing digital_media_(artwork) duo ectopenis flowans flower flowey_the_flower flowsans grey_background imminent_sex interspecies male male/male male_only monster monster_boy penis plant plant_penis plant_tentacle sans sans_(undertale) seme_flowey sex simple_background skeleton submissive sweat tentacle tentacle_around_penis tentacle_on_male tentaclejob top_flowey uke_sans undead undertale undertale_(series) unknown_artist video_game_character video_games vine_tentacles vinejob vines yaoi yellow_flower
2010s 2015 2boys 2d 2d_(artwork) animated_skeleton artist_signature black_background blue_blush blue_eye blue_jacket blue_penis blush bodily_fluids bottom_sans bound clothed clothing dark_background digital_media_(artwork) drooling duo ectopenis elatedsceptre flowans flower flowey_the_flower flowsans genital_fluids genitals glowing glowing_penis hooded_jacket interspecies jacket long_tongue looking_down male male/male male_only monster monster_boy penis plant plant_tentacle red_eyes sans sans_(undertale) seme_flowey sex simple_background skeleton submissive tentacle tentacle_on_male thorns tongue_out top_flowey uke_sans undead undertale undertale_(series) video_game_character video_games vine_tentacles vines yaoi yellow_flower
2010s 2015 2boys 2d 2d_(artwork) animated_skeleton artist_signature black_background blue_blush blue_eye blue_jacket blue_penis blush bodily_fluids bottom_sans bound clothed clothing dark_background digital_media_(artwork) drooling duo ectopenis elatedsceptre flowans flower flowey_the_flower flowsans genital_fluids genitals glowing glowing_penis hooded_jacket interspecies jacket long_tongue looking_down male male/male male_only monster monster_boy penis plant plant_tentacle red_eyes sans sans_(undertale) seme_flowey sex simple_background skeleton submissive tentacle tentacle_on_male thorns tongue_out top_flowey uke_sans undead undertale undertale_(series) video_game_character video_games vine_tentacles vines yaoi yellow_flower
1:1 1:1_aspect_ratio 2015 2boys 2d 2d_(artwork) alternate_version_available animated_skeleton blue_blush blush bodily_fluids bottom_sans bound bound_arms clothed clothing digital_media_(artwork) drooling duo flowans flower flowey_the_flower flowsans fluids goopynoms grey_background interspecies jacket male male/male male_only malesub monochrome monster monster_boy off_shoulder pants_down pants_pulled_down plant plant_tentacle sans sans_(undertale) seme_flowey sex simple_background skeleton submissive submissive_male tentacle tentacle_on_male tentacles_on_male top_flowey uke_sans undead undertale undertale_(series) video_game_character video_games vine_tentacles vines yaoi yellow_flower
1:1 1:1_aspect_ratio 2015 2boys 2d 2d_(artwork) alternate_version_available animated_skeleton blue_blush blush bodily_fluids bottom_sans bound bound_arms clothed clothing digital_media_(artwork) drooling duo flowans flower flowey_the_flower flowsans fluids goopynoms grey_background interspecies jacket male male/male male_only malesub monochrome monster monster_boy off_shoulder pants_down pants_pulled_down plant plant_tentacle sans sans_(undertale) seme_flowey sex simple_background skeleton submissive submissive_male tentacle tentacle_on_male tentacles_on_male top_flowey uke_sans undead undertale undertale_(series) video_game_character video_games vine_tentacles vines yaoi yellow_flower
2boys 2d 2d_(artwork) animated_skeleton artist_name blue_blush blue_penis blush bottom_sans choquiton completely_naked completely_nude completely_nude_male digital_media_(artwork) duo ectopenis flowans flower flowey_the_flower flowsans genitals glowing glowing_genitalia glowing_penis looking_at_genitalia looking_at_penis male male/male male_only malesub monochrome monster monster_boy nude nude_male partially_colored penis plant plant_tentacle rape sans sans_(undertale) seme_flowey sex simple_background skeleton submissive submissive_male tentacle tentacle_around_penis tentacle_on_male tentaclejob tentacles top_flowey uke_sans undead undertale undertale_(series) video_game_character video_games vine_tentacles vinejob vines yaoi
2boys 2d 2d_(artwork) animated_skeleton artist_name blue_blush blue_penis blush bottom_sans choquiton completely_naked completely_nude completely_nude_male digital_media_(artwork) duo ectopenis flowans flower flowey_the_flower flowsans genitals glowing glowing_genitalia glowing_penis looking_at_genitalia looking_at_penis male male/male male_only malesub monochrome monster monster_boy nude nude_male partially_colored penis plant plant_tentacle rape sans sans_(undertale) seme_flowey sex simple_background skeleton submissive submissive_male tentacle tentacle_around_penis tentacle_on_male tentaclejob tentacles top_flowey uke_sans undead undertale undertale_(series) video_game_character video_games vine_tentacles vinejob vines yaoi
2boys animal_genitalia bite biting blonde_hair breath_of_the_wild buttofthewild diphallia diphallism drowning human interspecies link link_(breath_of_the_wild) male male/male male_only multi_penis nintendo pale penis rape sex sidon_(zelda) size_difference tentacle_cock tentacle_on_male the_legend_of_zelda underwater underwater_sex urethral_rubbing water yaoi zora
2boys animal_genitalia bite biting blonde_hair breath_of_the_wild buttofthewild diphallia diphallism drowning human interspecies link link_(breath_of_the_wild) male male/male male_only multi_penis nintendo pale penis rape sex sidon_(zelda) size_difference tentacle_cock tentacle_on_male the_legend_of_zelda underwater underwater_sex urethral_rubbing water yaoi zora
2010s 2016 2boys 2d animated_skeleton arms_behind_back artist_name beoteono black_tentacles blue_blush blue_penis blush bodily_fluids bottom_sans buttercupsticks clothed clothing cussing digital_media dominant dominant_male drooling duo ectopenis feet_out_of_frame fluids grabbing_another's_chin grabbing_chin grey_background hand_under_chin hands_behind_back male male/male male_focus male_only maledom malesub monster one_eye_closed partially_colored penis precum profanity sans_(undertale) sanster seme_gaster simple_background skeleton soul soul_sex submissive submissive_male swearing tentacle tentacle_on_male tentacles tentacles_around_legs tentacles_on_male text top_gaster uke_sans undead undertale undertale_(series) video_games w.d._gaster yaoi
2010s 2016 2boys 2d animated_skeleton arms_behind_back artist_name beoteono black_tentacles blue_blush blue_penis blush bodily_fluids bottom_sans buttercupsticks clothed clothing cussing digital_media dominant dominant_male drooling duo ectopenis feet_out_of_frame fluids grabbing_another's_chin grabbing_chin grey_background hand_under_chin hands_behind_back male male/male male_focus male_only maledom malesub monster one_eye_closed partially_colored penis precum profanity sans_(undertale) sanster seme_gaster simple_background skeleton soul soul_sex submissive submissive_male swearing tentacle tentacle_on_male tentacles tentacles_around_legs tentacles_on_male text top_gaster uke_sans undead undertale undertale_(series) video_games w.d._gaster yaoi
2boys 2d anal animated_skeleton bigger_dom bigger_dom_smaller_sub bottom_sans carrying carrying_partner carrying_position cussing digital_media digital_media_m dominant dominant_male domination duo ectopenis english_text gay in_heat licking_face male male/male male_focus male_only maledom malesub monster monster_boy penis profanity reverse_stand_and_carry_position reverse_suspended_congress sans_(undertale) sanster seme_gaster sex simple_background skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom spoopy-gaster submissive submissive_male swearing tentacle tentacle_around_penis tentacle_on_male tentacle_sex text text_bubble top_gaster uke_sans undead undertale undertale_(series) video_games w.d._gaster yaoi
2boys 2d anal animated_skeleton bigger_dom bigger_dom_smaller_sub bottom_sans carrying carrying_partner carrying_position cussing digital_media digital_media_m dominant dominant_male domination duo ectopenis english_text gay in_heat licking_face male male/male male_focus male_only maledom malesub monster monster_boy penis profanity reverse_stand_and_carry_position reverse_suspended_congress sans_(undertale) sanster seme_gaster sex simple_background skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom spoopy-gaster submissive submissive_male swearing tentacle tentacle_around_penis tentacle_on_male tentacle_sex text text_bubble top_gaster uke_sans undead undertale undertale_(series) video_games w.d._gaster yaoi
1boy 2016 2d alternate_version_available animated_skeleton blue_hoodie blue_jacket bottom_sans bottomless bottomless_male digital_media gradient_background hood hooded_jacket jacket male male_focus male_only malesub monster monster_boy pink_slippers profanity purple_tentacles sans_(undertale) simple_background skeleton slippers solo solo_male submissive submissive_male teeth tentacle tentacle_on_male tentacles tentacles_on_male text tumblr_username twilightsuccubus undead undertale undertale_(series) variant_set video_game_character video_games
1boy 2016 2d alternate_version_available animated_skeleton blue_hoodie blue_jacket bottom_sans bottomless bottomless_male digital_media gradient_background hood hooded_jacket jacket male male_focus male_only malesub monster monster_boy pink_slippers profanity purple_tentacles sans_(undertale) simple_background skeleton slippers solo solo_male submissive submissive_male teeth tentacle tentacle_on_male tentacles tentacles_on_male text tumblr_username twilightsuccubus undead undertale undertale_(series) variant_set video_game_character video_games
1boy 2023 2d ahegao alternate_version_available animated_skeleton black_censor_bar blue_penis blue_tongue blush bottom_sans bound censor_bar censored_penis crying crying_with_eyes_open digital_media ectopenis ectoplasm ectotongue japanese_text konoha6 large_filesize male_ahegao monster monster_boy nude penetration penis purple_tentacles sans_(undertale) sex simple_background skeleton small_penis soul soul_sex speech_bubble submissive sweat tears tentacle tentacle_ejaculation tentacle_on_male tentacle_penetration tentacle_sex tentacles tentacles_around_legs tentacles_on_male text tongue_out undead undertale undertale_(series) urethral urethral_penetration variant_set video_games
1boy 2023 2d ahegao alternate_version_available animated_skeleton black_censor_bar blue_penis blue_tongue blush bottom_sans bound censor_bar censored_penis crying crying_with_eyes_open digital_media ectopenis ectoplasm ectotongue japanese_text konoha6 large_filesize male_ahegao monster monster_boy nude penetration penis purple_tentacles sans_(undertale) sex simple_background skeleton small_penis soul soul_sex speech_bubble submissive sweat tears tentacle tentacle_ejaculation tentacle_on_male tentacle_penetration tentacle_sex tentacles tentacles_around_legs tentacles_on_male text tongue_out undead undertale undertale_(series) urethral urethral_penetration 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
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 ahegao alternate_version_available animated_skeleton black_censor_bar blue_penis blue_tongue blush bottom_sans bound censor_bar censored_penis crying crying_with_eyes_open digital_media ectopenis ectoplasm ectotongue konoha6 large_filesize male_ahegao monster monster_boy nude penetration penis purple_tentacles sans_(undertale) sex simple_background skeleton small_penis solo soul soul_sex submissive tears tentacle tentacle_ejaculation tentacle_on_male tentacle_penetration tentacle_sex tentacles_around_legs tentacles_on_male textless textless_version tongue_out undead undertale undertale_(series) urethral urethral_penetration variant_set video_games
1boy 2023 2d ahegao alternate_version_available animated_skeleton black_censor_bar blue_penis blue_tongue blush bottom_sans bound censor_bar censored_penis crying crying_with_eyes_open digital_media ectopenis ectoplasm ectotongue konoha6 large_filesize male_ahegao monster monster_boy nude penetration penis purple_tentacles sans_(undertale) sex simple_background skeleton small_penis solo soul soul_sex submissive tears tentacle tentacle_ejaculation tentacle_on_male tentacle_penetration tentacle_sex tentacles_around_legs tentacles_on_male textless textless_version tongue_out undead undertale undertale_(series) urethral urethral_penetration 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
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 blush bottom_sans bound digital_media gloves gloves_only green_background green_tentacles imminent_penetration imminent_rape imminent_sex imminent_tentacle_rape konoha6 large_filesize legs_apart legs_forced_open legs_held_open monster monster_boy nude sans_(undertale) skeleton socks socks_only solo_male submissive sweat teeth tentacle tentacle_on_male tentacles_around_arms tentacles_around_legs undead undertale undertale_(series) variant_set video_games
1boy 2023 2d absurd_res absurdres animated_skeleton blush bottom_sans bound digital_media gloves gloves_only green_background green_tentacles imminent_penetration imminent_rape imminent_sex imminent_tentacle_rape konoha6 large_filesize legs_apart legs_forced_open legs_held_open monster monster_boy nude sans_(undertale) skeleton socks socks_only solo_male submissive sweat teeth tentacle tentacle_on_male tentacles_around_arms tentacles_around_legs undead undertale undertale_(series) variant_set video_games
!? 1boy 2d aether_(genshin_impact) blonde_hair bottom_aether braid braided_hair clothed clothing digital_media femboy femboy_only genshin_impact male_focus male_only malesub midriff miryoryo9 red_tentacles spoken_exclamation_mark spoken_exclamation_point spoken_question_mark tentacle tentacle_on_male tentacle_rape tentacle_sex tentacles_on_male video_game_character video_games yaoi yellow_eyes
!? 1boy 2d aether_(genshin_impact) blonde_hair bottom_aether braid braided_hair clothed clothing digital_media femboy femboy_only genshin_impact male_focus male_only malesub midriff miryoryo9 red_tentacles spoken_exclamation_mark spoken_exclamation_point spoken_question_mark tentacle tentacle_on_male tentacle_rape tentacle_sex tentacles_on_male video_game_character video_games yaoi yellow_eyes
1boy 2d 2d_(artwork) animated_skeleton artist_name blue_blush blue_tentacles blush bottom_sans bound bound_arms completely_nude completely_nude_male digital_media_(artwork) drooling male male_focus male_only malesub monochrome monster nude nude_male one_eye_closed partially_colored restrained sans sans_(undertale) simple_background singingsans skeleton solo_male submissive submissive_male tentacle tentacle_around_arm tentacle_around_arms tentacle_around_leg tentacle_on_male tentacle_sex tentacles tentacles_on_male third-party_source uke_sans undead undertale undertale_(series) video_game_character video_games
1boy 2d 2d_(artwork) animated_skeleton artist_name blue_blush blue_tentacles blush bottom_sans bound bound_arms completely_nude completely_nude_male digital_media_(artwork) drooling male male_focus male_only malesub monochrome monster nude nude_male one_eye_closed partially_colored restrained sans sans_(undertale) simple_background singingsans skeleton solo_male submissive submissive_male tentacle tentacle_around_arm tentacle_around_arms tentacle_around_leg tentacle_on_male tentacle_sex tentacles tentacles_on_male third-party_source uke_sans undead undertale undertale_(series) video_game_character video_games
1boy 2010s 2016 2d 2d_(artwork) animated_skeleton blue_blush blue_eyes blue_tentacles blue_tongue blush bottom_sans completely_nude completely_nude_male dark_background digital_media_(artwork) disembodied_hand disembodied_hands drooling ectotongue feet_out_of_frame hands heart-shaped_pupils heart_eyes male male_focus male_only malesub monster nude nude_male penis sans sans_(undertale) simple_background skeleton soul soul_sex spontaneouslynsfw submissive submissive_female submissive_male tentacle tentacle_on_male tentacle_sex tentacles_on_male tongue uke_sans undead undertale undertale_(series) video_game_character video_games wet
1boy 2010s 2016 2d 2d_(artwork) animated_skeleton blue_blush blue_eyes blue_tentacles blue_tongue blush bottom_sans completely_nude completely_nude_male dark_background digital_media_(artwork) disembodied_hand disembodied_hands drooling ectotongue feet_out_of_frame hands heart-shaped_pupils heart_eyes male male_focus male_only malesub monster nude nude_male penis sans sans_(undertale) simple_background skeleton soul soul_sex spontaneouslynsfw submissive submissive_female submissive_male tentacle tentacle_on_male tentacle_sex tentacles_on_male tongue uke_sans undead undertale undertale_(series) video_game_character video_games wet
1boy 2d 2d_(artwork) animated_skeleton artist_name blush bottom_sans bottomless bottomless_male choking dubnyangg fangs heart heart-shaped_pupils heart_eyes humanoid male male_only monster monster_boy oral sans sans_(undertale) skeleton solo_male submissive submissive_male tears tentacle tentacle_around_arm tentacle_around_leg tentacle_around_neck tentacle_grab tentacle_in_mouth tentacle_on_male tongue tongue_out uke_sans undead undertale undertale_(series) video_game_character video_games
1boy 2d 2d_(artwork) animated_skeleton artist_name blush bottom_sans bottomless bottomless_male choking dubnyangg fangs heart heart-shaped_pupils heart_eyes humanoid male male_only monster monster_boy oral sans sans_(undertale) skeleton solo_male submissive submissive_male tears tentacle tentacle_around_arm tentacle_around_leg tentacle_around_neck tentacle_grab tentacle_in_mouth tentacle_on_male tongue tongue_out uke_sans undead undertale undertale_(series) video_game_character video_games
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2010s 2018 2boys 2d 2d_(artwork) animated_skeleton blue_penis bottom_sans bottomless bottomless_male cum cumshot digital_media_(artwork) drooling duo ectopenis ejaculation flowans flower flowey_the_flower gay genitals grin ladybumtickler male male/male male_only monster monster_boy penile penis plant sans sans_(undertale) seme_flowey skeleton smile sniggysmut tentacle tentacle_around_penis tentacle_on_male tentaclejob tentacles_around_ankles tentacles_around_arms tentacles_around_legs tentacles_on_male text top_flowey tumblr uke_sans undead undertale undertale_(series) video_game_character video_games vine_tentacles vinejob vines white_background yaoi yellow_flower
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2boys 2d 2d_(artwork) 4_fingers animated_skeleton blue_blush blue_penis blush bone bottom_sans clothed dark_background digital_media_(artwork) duo ectopenis flowans flower flowey_the_flower flowsans genitals gradient_background interspecies male male/male male_only monster penis plant purple_background sans sans_(undertale) seme_flowey simple_background skeleton smile sweat tentacle tentacle_on_male tentaclejob tentacles_on_male testicle text tinybeasts tinynsfw top_flowey uke_sans undead undertale undertale_(series) video_game_character video_games vine_tentacles vinejob vines yaoi
1boy 2016 2d 2d_(artwork) animated_skeleton artist_name black_background black_tentacles blue_blush blue_eye blue_penis blue_tongue blush bottom_sans clothed crying crying_with_eyes_open digital_media_(artwork) drooling ectopenis genitals heart heki_(miss60250) looking_down male male_focus male_moaning male_only malesub moaning monster monster_boy penis penis_out sans sans_(undertale) simple_background skeleton solo_focus solo_male soul submissive submissive_male sweat tears tentacle tentacle_on_male tentacles_around_arms tentacles_around_wrists text third-party_source tongue tongue_out tumblr uke_sans undead undertale undertale_(series) video_game_character video_games
1boy 2016 2d 2d_(artwork) animated_skeleton artist_name black_background black_tentacles blue_blush blue_eye blue_penis blue_tongue blush bottom_sans clothed crying crying_with_eyes_open digital_media_(artwork) drooling ectopenis genitals heart heki_(miss60250) looking_down male male_focus male_moaning male_only malesub moaning monster monster_boy penis penis_out sans sans_(undertale) simple_background skeleton solo_focus solo_male soul submissive submissive_male sweat tears tentacle tentacle_on_male tentacles_around_arms tentacles_around_wrists text third-party_source tongue tongue_out tumblr uke_sans undead undertale undertale_(series) video_game_character video_games
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1boy 2020s 2023 2d 2d_(artwork) animated_skeleton black_shirt blue_penis blue_tentacles blush bottom_sans digital_media_(artwork) ectopenis genitals legs_apart legs_spread looking_down male male_focus male_only malesub matcha_mothh monster monster_boy pants_around_one_leg pants_pulled_down penis pink_socks precum purple_socks sans sans_(undertale) shirt_lift shirt_up skeleton socks socks_on solo_focus solo_male submissive submissive_male tentacle tentacle_around_arm tentacle_around_leg tentacle_around_penis tentacle_on_male tentacles_around_arms tentacles_around_legs twitter uke_sans undead undertale undertale_(series) video_game_character video_games
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2020s 2022 2boys 2d 2d_(artwork) absurd_res absurdres anal anal_sex anal_through_clothes animated_skeleton autofootjob big_penis blue_blush blue_hoodie blue_jacket blue_penis blush bodily_fluids bone bottom_sans bound clothed clothed_rape clothing cum cum_in_ass cum_inside cum_on_face cum_on_own_face cum_on_self digital_media_(artwork) duo ectopenis ejaculation flowans flower flowey_the_flower foot_fetish foot_play footjob footwear forced fully_clothed genital_fluids genitals hi_res hooded_jacket hoodie humanoid looking_at_genitalia looking_at_own_penis looking_at_penis looking_down looking_down_at_self male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy penetration penis plant plant_tentacle rape sans sans_(undertale) self_footjob seme_flowey sex sex_through_clothes simple_background skeleton socks submissive tentacle tentacle_on_male tentacle_penetration tentacle_rape testicles top_flowey topwear uke_sans undead undertale undertale_(series) video_game_character video_games vine_tentacles vines white_background yaoi yellow_flower
1boy 2d 2d_(artwork) 2d_animation anal anal_penetration animated_skeleton arms_behind_back blinking blush bottom_sans bottomless crying digital_media_(artwork) drooling ectobody ectopenis genitals grey_background hands_behind_back legs_apart legs_spread male male_focus male_only malesub monochrome monster monster_boy penetration penis sans sans_(undertale) sex simple_background skeleton small_penis solo_focus solo_male spread_legs submissive submissive_male sweat tears tentacle tentacle_on_male tentacle_penetration tentacle_sex tentacles_around_legs uke_sans undead undertale undertale_(series) unknown_artist unknown_source video_games
1boy 2d 2d_(artwork) 2d_animation anal anal_penetration animated_skeleton arms_behind_back blinking blush bottom_sans bottomless crying digital_media_(artwork) drooling ectobody ectopenis genitals grey_background hands_behind_back legs_apart legs_spread male male_focus male_only malesub monochrome monster monster_boy penetration penis sans sans_(undertale) sex simple_background skeleton small_penis solo_focus solo_male spread_legs submissive submissive_male sweat tears tentacle tentacle_on_male tentacle_penetration tentacle_sex tentacles_around_legs uke_sans undead undertale undertale_(series) unknown_artist unknown_source video_games
1:1 1:1_aspect_ratio 2015 2boys 2d 2d_(artwork) alternate_version_available animated_skeleton blue_blush blue_penis blush bodily_fluids bottom_sans bound bound_arms clothed clothing digital_media_(artwork) drooling duo duplicate ectopenis flowans flower flowey_the_flower flowsans fluids goopynoms grey_background interspecies jacket male male/male male_only malesub monochrome monster monster_boy off_shoulder pants_down pants_pulled_down penis plant plant_tentacle sans sans_(undertale) seme_flowey sex simple_background skeleton submissive submissive_male tentacle tentacle_on_male tentacles_on_male top_flowey uke_sans 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 2d_(artwork) alternate_version_available animated_skeleton blue_blush blue_penis blush bodily_fluids bottom_sans bound bound_arms clothed clothing digital_media_(artwork) drooling duo duplicate ectopenis flowans flower flowey_the_flower flowsans fluids goopynoms grey_background interspecies jacket male male/male male_only malesub monochrome monster monster_boy off_shoulder pants_down pants_pulled_down penis plant plant_tentacle sans sans_(undertale) seme_flowey sex simple_background skeleton submissive submissive_male tentacle tentacle_on_male tentacles_on_male top_flowey uke_sans 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 2d_(artwork) alternate_version_available animated_skeleton blue_blush blue_penis blush bodily_fluids bottom_sans bound bound_arms clothed clothing digital_media_(artwork) drooling duo ectopenis flowans flower flowey_the_flower flowsans fluids genitals goopynoms grey_background interspecies jacket male male/male male_only malesub monochrome monster monster_boy off_shoulder pants_down pants_pulled_down penis plant plant_tentacle sans sans_(undertale) seme_flowey sex simple_background skeleton submissive submissive_male tentacle tentacle_around_penis tentacle_on_male tentacles_on_male top_flowey uke_sans 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 2d_(artwork) alternate_version_available animated_skeleton blue_blush blue_penis blush bodily_fluids bottom_sans bound bound_arms clothed clothing digital_media_(artwork) drooling duo ectopenis flowans flower flowey_the_flower flowsans fluids genitals goopynoms grey_background interspecies jacket male male/male male_only malesub monochrome monster monster_boy off_shoulder pants_down pants_pulled_down penis plant plant_tentacle sans sans_(undertale) seme_flowey sex simple_background skeleton submissive submissive_male tentacle tentacle_around_penis tentacle_on_male tentacles_on_male top_flowey uke_sans undead undertale undertale_(series) video_game_character video_games vine_tentacles vinejob vines yaoi yellow_flower
2010s 2016 2boys 2d animated_skeleton bigger_dom bigger_dom_smaller_sub bigger_male black_body black_penis black_tentacles blue_blush blue_body blue_penis blue_tongue blush bottom_sans bottomless clothed digital_media drooling ectobody ectopenis ectoplasm goo grabbing_chin grabbing_face grabbing_own_penis gradient_background grey_background half-closed_eyes holding_own_penis hooded_jacket hoodie jacket larger_male male male/male male_only maledom malesub partially_clothed partially_nude penis precum safetytrance sans_(undertale) sanster skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom sweat tentacle tentacle_on_male tentacle_under_clothes tentacles tentacles_around_arms tentacles_around_legs tentacles_on_male tongue tongue_out uke_sans undead undertale undertale_(series) video_games w.d._gaster yaoi
2010s 2016 2boys 2d animated_skeleton bigger_dom bigger_dom_smaller_sub bigger_male black_body black_penis black_tentacles blue_blush blue_body blue_penis blue_tongue blush bottom_sans bottomless clothed digital_media drooling ectobody ectopenis ectoplasm goo grabbing_chin grabbing_face grabbing_own_penis gradient_background grey_background half-closed_eyes holding_own_penis hooded_jacket hoodie jacket larger_male male male/male male_only maledom malesub partially_clothed partially_nude penis precum safetytrance sans_(undertale) sanster skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom sweat tentacle tentacle_on_male tentacle_under_clothes tentacles tentacles_around_arms tentacles_around_legs tentacles_on_male tongue tongue_out uke_sans undead undertale undertale_(series) video_games w.d._gaster yaoi
1boy 2016 2d alternate_version_available animated_skeleton blue_hoodie blue_jacket blue_penis bottom_sans bottomless bottomless_male cussing digital_media ectopenis genitals gradient_background hood hooded_jacket jacket male male_only malesub monster monster_boy penis pink_slippers profanity purple_tentacles sans_(undertale) simple_background skeleton slippers solo solo_male submissive submissive_male teeth tentacle tentacle_on_male tentacles tentacles_on_male text tumblr_username twilightsuccubus undead undertale undertale_(series) variant_set video_game_character video_games
1boy 2016 2d alternate_version_available animated_skeleton blue_hoodie blue_jacket blue_penis bottom_sans bottomless bottomless_male cussing digital_media ectopenis genitals gradient_background hood hooded_jacket jacket male male_only malesub monster monster_boy penis pink_slippers profanity purple_tentacles sans_(undertale) simple_background skeleton slippers solo solo_male submissive submissive_male teeth tentacle tentacle_on_male tentacles tentacles_on_male text tumblr_username twilightsuccubus undead undertale undertale_(series) variant_set video_game_character video_games
1boy 2010s alternate_background alternate_version_available animated_skeleton art_trade blue_tongue bottom_sans clothed heart-shaped_pupils heart_eyes joah_(artist) male male_only moaning monster one_eye_closed sans sans_(undertale) skeleton solo solo_male submissive tentacle tentacle_on_male tentacles_on_male tongue tongue_out uke_sans undead undertale undertale_(series) white_background
1boy 2010s alternate_background alternate_version_available animated_skeleton art_trade blue_tongue bottom_sans clothed heart-shaped_pupils heart_eyes joah_(artist) male male_only moaning monster one_eye_closed sans sans_(undertale) skeleton solo solo_male submissive tentacle tentacle_on_male tentacles_on_male tongue tongue_out uke_sans undead undertale undertale_(series) white_background