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1girls 2boys alternate_breast_size alternate_outfit anthro anthrofied being_watched big_breasts black_sclera black_shirt black_skirt black_thighhighs blue_eyes blue_sans_penis blue_sans_tongue breasts chelodoy cleavage deltarune dress feet female hair_over_eyes half-closed_eyes huge_ass huge_breasts human kneeling kris_(deltarune) larger_female male meta_request monster necklace on_knees purple_hair red_eyes sans sans_glowing_eye scalie shirt sitting size_difference skeleton skirt smaller_male source_request standing susie_(deltarune) text thick_thighs thighhighs undertale voyeur watermark white_skin wide_hips window yellow_sclera
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1girls 5hitzzzu alternate_universe animated_skeleton big_breasts blue_body blue_eyes blue_sans_penis blue_sans_tongue blue_scarf blue_tongue boombita breasts cleavage clothing ectobody ectobreasts ectotongue eyelashes female female_only funcu funculicious genderswap meatcuteshii meta_request pinkbobatoo rule_63 sans sans_(underswap) sans_au sans_glowing_eye scarf simple_background skeleton skiddioop solid_color_background solo solo_female star_pupils stereodaddy tagme tongue tongue_out underswap underswap_sans undertale_au
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2020 5_fingers absurd_res animated_skeleton anthro artist_name ass ass_squeeze bed bed_sheet bedroom between_ass between_buttocks big_ass big_breasts big_butt blue_eyes blue_glow blue_hoodie blue_sans_penis blue_sans_tongue bovid bovid_humanoid breasts buttjob buttjob_under_clothes caprine caprine_humanoid clothed clothed_male clothed_male_nude_female clothed_sex clothes clothing costume covered_buttjob daddy_kink dat_ass dialogue digital_media_(artwork) duo english_text eyebrows eyelashes female floppy_ears fur glowing_eye goat goat_ears goat_horns goat_humanoid goat_tail halloween hands_on_ass hi_res holidays hoodie huge_ass huge_butt humanoid lightsaber_dick looking_at_partner looking_back looking_to_the_side male meta_request mummy_costume nude nude_female on_bed outercourse penis penis_between_ass precum precum_bubble sans sans_blush sans_eye sans_glowing_eye sans_penis sans_tongue sex short_tail skeleton smiling speech_bubble tail text text_bubble toriel undertale veiny_penis white_fur white_skin wide_hips witdrawsloods yellow_eyes
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1boy 2d alternate_universe animated_skeleton annoyed annoyed_expression annoyed_face anthro balls bell_collar big_balls big_penis blue_eyes blue_sans_penis blue_sans_tongue collar dg_ring dreamtale ectopenis huge_penis humanoid large_penis male male_only meta_request nightmare_sans nightmare_sans_(fan_character) penis pet_collar pink_collar sans sans_au sans_glowing_eye simple_background skeleton solo tagme tentacles testicles throbbing_penis undertale_(series) undertale_au veiny_penis
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1boy 2016 animated_skeleton black_background black_tentacles blue_blush blue_dick blue_eyes blue_penis blue_pupils blue_sans_penis blue_sans_tongue blue_testicles blue_tongue blush clothed crying crying_with_eyes_open drooling ectopenis ectotongue heart heki_(artist) looking_down male male_focus male_only meta_request miss60250 moaning nightmare_sans nightmare_sans_(fan_character) penis penis_out sans sans_(undertale) sans_blush sans_eye sans_glowing_eye sans_penis skeleton solo_focus soul sweat tears tentacle tentacles_around_arms tentacles_around_wrists tentacles_on_male text tongue tongue_out undertale undertale_(series)
1boy 2016 animated_skeleton black_background black_tentacles blue_blush blue_dick blue_eyes blue_penis blue_pupils blue_sans_penis blue_sans_tongue blue_testicles blue_tongue blush clothed crying crying_with_eyes_open drooling ectopenis ectotongue heart heki_(artist) looking_down male male_focus male_only meta_request miss60250 moaning nightmare_sans nightmare_sans_(fan_character) penis penis_out sans sans_(undertale) sans_blush sans_eye sans_glowing_eye sans_penis skeleton solo_focus soul sweat tears tentacle tentacles_around_arms tentacles_around_wrists tentacles_on_male text tongue tongue_out undertale undertale_(series)
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2boys animated_skeleton anterior_nasal_aperture asgore_dreemurr beard black_eyes blonde_beard blonde_hair blue_eyes blue_penis blue_sans_penis blue_sans_tongue blush blushing bodily_fluids bodily_fluids_in_mouth bone bones boss_monster caprine clothing dialogue duo duo_focus embarrassed english_text facial_hair fur furry gay glowing glowing_eyes glowing_genitalia glowing_penis goat hoodie horn lightsaber_dick long_ears looking_at_another looking_at_partner male male_focus male_only mammal meta_request pants pants_open penis sans sans_glowing_eye simple_background skeleton slightly_chubby smile smiling speech_bubble sweat sweatdrop sweatshirt teeth text tongue topwear undead undertale video_game video_games white_fur yaoi
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2019 ambiguous_gender animated_skeleton blue_eyes blue_penis blue_sans_penis blue_sans_tongue blue_tongue bone clothing duo erection first_person_view genitals glowing glowing_eyes hi_res humanoid imminent_sex licking licking_lips licking_own_lips lightsaber_dick magnta male male/ambiguous male_focus male_only meta_request not_furry penis sans sans_blush sans_eye sans_glowing_eye sans_penis sans_tongue self_lick shirt skeleton solo_focus t-shirt taker_pov tongue tongue_out topwear undead undertale video_games white_clothing white_shirt white_topwear
2019 ambiguous_gender animated_skeleton blue_eyes blue_penis blue_sans_penis blue_sans_tongue blue_tongue bone clothing duo erection first_person_view genitals glowing glowing_eyes hi_res humanoid imminent_sex licking licking_lips licking_own_lips lightsaber_dick magnta male male/ambiguous male_focus male_only meta_request not_furry penis sans sans_blush sans_eye sans_glowing_eye sans_penis sans_tongue self_lick shirt skeleton solo_focus t-shirt taker_pov tongue tongue_out topwear undead undertale video_games white_clothing white_shirt white_topwear
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2010s 2018 animated_skeleton blue_blush blue_eyes blue_hoodie blue_jacket blue_sans_penis blue_sans_tongue blue_tongue blush clothed cussing drooling eye_fucking eye_penetration gay heart-shaped_pupils heart_eyes hooded_jacket hoodie jacket male male_penetrated meta_request monster penis penis_in_eye sans sans_(undertale) sans_glowing_eye skeleton skull_fucking solo_focus swearing text tongue tongue_out undead undertale undertale_(series) unknown_artist unseen_male unseen_male_face upper_body visible_breath white_background
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2015 animated_skeleton anthro asgore_dreemurr beard belly blonde_hair blue_background blue_eyes blue_sans_penis blue_sans_tongue blush body_hair bone boss_monster bottomless caprine clothed clothing cum cum_on_ground cumshot duo ejaculation facial_hair fangs fur goat hair hi_res horn jacket long_ears male male_only mammal manlyster meta_request open_mouth orgasm overweight penis sans sans_blush sans_eye sans_glowing_eye sans_penis sans_tongue simple_background skeleton tongue tongue_out undead undertale video_games watch
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2022 2boys animated_skeleton bigger_male blowjob blue_blush blue_eyes blue_hoodie blue_jacket blue_penis blue_sans_penis blue_sans_tongue blush brother_penetrating_brother brothers carne_392f carrying carrying_partner clothed dark_background ectopenis ectoplasm fellatio gay glowing grabbing_legs hooded_jacket hoodie incest jacket larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male meta_request monster orange_blush orange_penis papyrus sans sans_glowing_eye shirt_lift shirt_up simple_background sitting skeleton smaller_male smaller_penetrated undead undertale undertale_(series) yaoi
2022 2boys animated_skeleton bigger_male blowjob blue_blush blue_eyes blue_hoodie blue_jacket blue_penis blue_sans_penis blue_sans_tongue blush brother_penetrating_brother brothers carne_392f carrying carrying_partner clothed dark_background ectopenis ectoplasm fellatio gay glowing grabbing_legs hooded_jacket hoodie incest jacket larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male meta_request monster orange_blush orange_penis papyrus sans sans_glowing_eye shirt_lift shirt_up simple_background sitting skeleton smaller_male smaller_penetrated undead undertale undertale_(series) yaoi
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1boy 2021 animated_skeleton anterior_nasal_aperture blue_and_white blue_blush blue_clothing blue_eyes blue_penis blue_sans_penis blue_sans_tongue blush bodily_fluids bone bottomwear clothing digital_media_(artwork) erection gaster_blaster genitals glans grin hands_in_pockets hi_res hoodie humanoid male male_only meta_request monochrome not_furry open_mouth penis penis_through_fly penis_with_face pockets poking_out sans sans_glowing_eye shirt shorts simple_background sirtoasterbutt skeleton smile solo standing sweat teeth text topwear undead undertale unusual_anatomy unusual_genitalia unusual_penis video_games white_background white_clothing white_glans white_shirt white_topwear
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1boy 2021 animated_skeleton anterior_nasal_aperture blue_and_white blue_blush blue_clothing blue_eyes blue_penis blue_sans_penis blue_sans_tongue blush bodily_fluids bone bottomwear clothing digital_media_(artwork) erection eyebrows gaster_blaster genital_fluids genitals glans grin hands_in_pockets hi_res hoodie humanoid male male_only meta_request monochrome open_mouth penis penis_through_fly penis_with_face pockets poking_out precum raised_eyebrow saliva sans sans_glowing_eye shirt shorts simple_background sirtoasterbutt skeleton smile solo standing teeth topwear undead undertale unusual_anatomy unusual_genitalia unusual_penis video_games white_background white_clothing white_glans white_shirt white_topwear
1boy 2021 animated_skeleton anterior_nasal_aperture blue_and_white blue_blush blue_clothing blue_eyes blue_penis blue_sans_penis blue_sans_tongue blush bodily_fluids bone bottomwear clothing digital_media_(artwork) erection eyebrows gaster_blaster genital_fluids genitals glans grin hands_in_pockets hi_res hoodie humanoid male male_only meta_request monochrome open_mouth penis penis_through_fly penis_with_face pockets poking_out precum raised_eyebrow saliva sans sans_glowing_eye shirt shorts simple_background sirtoasterbutt skeleton smile solo standing teeth topwear undead undertale unusual_anatomy unusual_genitalia unusual_penis video_games white_background white_clothing white_glans white_shirt white_topwear