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2023 2boys 2d animated_skeleton artist_name blue_belly blue_blush blush bodily_fluids boner_blossom bottom_sans brother/brother brother_penetrating_brother brothers clothed clothing digital_media drooling duo ectobelly ectopenis english_text fantasizing fontcest genitals hooded_jacket hoodie humanoid imagining implied_penetration implied_sex incest intraspecies jacket lineart looking_at_genitalia looking_at_penis male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy orange_penis papyrus_(undertale) papysans penis pleasure_face precum precum_drip profanity sans_(undertale) sibling_incest siblings skeleton sweat teeth text thought_bubble top_papyrus twitter_username undead undertale undertale_(series) veiny_penis video_game_character video_games white_background yaoi
2023 2boys 2d animated_skeleton artist_name blue_belly blue_blush blush bodily_fluids boner_blossom bottom_sans brother/brother brother_penetrating_brother brothers clothed clothing digital_media drooling duo ectobelly ectopenis english_text fantasizing fontcest genitals hooded_jacket hoodie humanoid imagining implied_penetration implied_sex incest intraspecies jacket lineart looking_at_genitalia looking_at_penis male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy orange_penis papyrus_(undertale) papysans penis pleasure_face precum precum_drip profanity sans_(undertale) sibling_incest siblings skeleton sweat teeth text thought_bubble top_papyrus twitter_username undead undertale undertale_(series) veiny_penis video_game_character video_games white_background yaoi
2022 2boys 2d animated_skeleton bigger_male black_pants blue_blush blue_hoodie blue_jacket blue_penis blush blushing_male bonerut bottomless bottomless_male brother brother_and_brother brothers brown_background clothed clothing couch digital_media duo ectopenis eyeless eyeless_male fluids fully_clothed fully_clothed_male genital_fluids genitals gloves hand_on_face hand_on_own_face hooded_jacket hoodie implied_incest implied_yaoi incest jacket larger_male male male_masturbation male_only masturbating_together masturbation monster monster_boy orange_blush orange_penis pants papyrus_(undertale) partially_clothed partially_clothed_male penile penile_masturbation penis pink_footwear pink_gloves precum red_gloves sans_(undertale) sibling_incest siblings simple_background sitting sitting_on_couch size_difference skeleton slippers smaller_male undead undertale undertale_(series) video_game_character video_games
2022 2boys 2d animated_skeleton bigger_male black_pants blue_blush blue_hoodie blue_jacket blue_penis blush blushing_male bonerut bottomless bottomless_male brother brother_and_brother brothers brown_background clothed clothing couch digital_media duo ectopenis eyeless eyeless_male fluids fully_clothed fully_clothed_male genital_fluids genitals gloves hand_on_face hand_on_own_face hooded_jacket hoodie implied_incest implied_yaoi incest jacket larger_male male male_masturbation male_only masturbating_together masturbation monster monster_boy orange_blush orange_penis pants papyrus_(undertale) partially_clothed partially_clothed_male penile penile_masturbation penis pink_footwear pink_gloves precum red_gloves sans_(undertale) sibling_incest siblings simple_background sitting sitting_on_couch size_difference skeleton slippers smaller_male undead undertale undertale_(series) video_game_character video_games
2022 2boys 2d animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_hoodie blue_jacket bonerut boots bottom_sans brother/brother brothers clothed clothing digital_media duo erection erection_under_clothes fontcest gloves hooded_jacket hoodie incest intraspecies jacket larger_male male male_only male_penetrating monster monster_boy multiple_views pants papyrus_(undertale) papysans pink_footwear pink_gloves red_footwear red_gloves sans_(undertale) sibling_incest siblings skeleton slippers small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom top_papyrus undead undertale undertale_(series) yaoi
2022 2boys 2d animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_hoodie blue_jacket bonerut boots bottom_sans brother/brother brothers clothed clothing digital_media duo erection erection_under_clothes fontcest gloves hooded_jacket hoodie incest intraspecies jacket larger_male male male_only male_penetrating monster monster_boy multiple_views pants papyrus_(undertale) papysans pink_footwear pink_gloves red_footwear red_gloves sans_(undertale) sibling_incest siblings skeleton slippers small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom top_papyrus undead undertale undertale_(series) yaoi
2010s 2016 2boys 2d 2d_(artwork) amortem-kun animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blue_hoodie blue_jacket blue_slippers blush boots bottom_sans brother brother/brother brother_and_brother brothers chair clothed clothing couch digital_media_(artwork) duo ectotongue fontcest formal formal_clothes formal_wear furniture gloves green_couch hand_in_pocket hands_on_hips height_difference hooded_jacket hoodie incest jacket kissing larger_male licking licking_neck male male/male male_only monster monster_boy multiple_views neck_tie necktie necktie_grab orange_blush orange_necktie orange_tongue papyrus papyrus_(undertale) papysans red_boots red_gloves sans sans_(undertale) seme_papyrus shoes shorter_male sibling_incest siblings simple_background sitting_on_couch sitting_on_sofa size_difference skeleton slippers small_sub smaller_male smaller_sub smaller_sub_bigger_dom sofa standing standing_on_chair standing_on_stool stool suit taller_male top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games white_background yaoi
2010s 2016 2boys 2d 2d_(artwork) amortem-kun animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blue_hoodie blue_jacket blue_slippers blush boots bottom_sans brother brother/brother brother_and_brother brothers chair clothed clothing couch digital_media_(artwork) duo ectotongue fontcest formal formal_clothes formal_wear furniture gloves green_couch hand_in_pocket hands_on_hips height_difference hooded_jacket hoodie incest jacket kissing larger_male licking licking_neck male male/male male_only monster monster_boy multiple_views neck_tie necktie necktie_grab orange_blush orange_necktie orange_tongue papyrus papyrus_(undertale) papysans red_boots red_gloves sans sans_(undertale) seme_papyrus shoes shorter_male sibling_incest siblings simple_background sitting_on_couch sitting_on_sofa size_difference skeleton slippers small_sub smaller_male smaller_sub smaller_sub_bigger_dom sofa standing standing_on_chair standing_on_stool stool suit taller_male top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games white_background yaoi
1:1 1:1_aspect_ratio 1boy 1boy1girl 1girl 2010s 2016 2d 2d_(artwork) animated_skeleton artist_name big_breasts blue_blush blue_body blue_breasts blue_hoodie blue_jacket blue_nipples blush breasts brother/sister brother_and_sister clothed_male digital_media_(artwork) duo ectobody ectobreasts ectotongue female_sans fontcest genderswap genderswap_(mtf) grey_background hooded_jacket hoodie incest intraspecies jacket licking licking_nipples male memeshero monster nipples nursing off_shoulder off_shoulders orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_clothed sans sans_(undertale) sibling_incest siblings simple_background skeleton solid_color_background sucking_nipples undead undertale undertale_(series) upper_body video_game_character video_games
1:1 1:1_aspect_ratio 1boy 1boy1girl 1girl 2010s 2016 2d 2d_(artwork) animated_skeleton artist_name big_breasts blue_blush blue_body blue_breasts blue_hoodie blue_jacket blue_nipples blush breasts brother/sister brother_and_sister clothed_male digital_media_(artwork) duo ectobody ectobreasts ectotongue female_sans fontcest genderswap genderswap_(mtf) grey_background hooded_jacket hoodie incest intraspecies jacket licking licking_nipples male memeshero monster nipples nursing off_shoulder off_shoulders orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_clothed sans sans_(undertale) sibling_incest siblings simple_background skeleton solid_color_background sucking_nipples undead undertale undertale_(series) upper_body video_game_character video_games
animated_skeleton artist_name ass blue_blush blue_tongue blush bottom_sans butt clothed clothing crotch_focus glowing glowing_genitalia grabbing_own_ass heart-shaped_pupils heart_eyes hooded_jacket hoodie jacket legs_apart legs_spread looking_at_viewer male_only monochrome monster pants partially_colored sans sans_(undertale) simple_background skeleton solo submissive titleze tongue uke_sans undead undertale undertale_(series)
animated_skeleton artist_name ass blue_blush blue_tongue blush bottom_sans butt clothed clothing crotch_focus glowing glowing_genitalia grabbing_own_ass heart-shaped_pupils heart_eyes hooded_jacket hoodie jacket legs_apart legs_spread looking_at_viewer male_only monochrome monster pants partially_colored sans sans_(undertale) simple_background skeleton solo submissive titleze tongue uke_sans undead undertale undertale_(series)
animated_skeleton artist_name blue_blush blue_tongue blush clothed clothing ectotongue heart-shaped_pupils heart_eyes hooded_jacket hoodie jacket looking_at_viewer male_only monochrome monster pants partially_colored sans sans_(undertale) simple_background skeleton solo straddling titleze tongue tongue_out undead undertale undertale_(series)
animated_skeleton artist_name blue_blush blue_tongue blush clothed clothing ectotongue heart-shaped_pupils heart_eyes hooded_jacket hoodie jacket looking_at_viewer male_only monochrome monster pants partially_colored sans sans_(undertale) simple_background skeleton solo straddling titleze tongue tongue_out undead undertale undertale_(series)
1:1 1:1_aspect_ratio 1boy 2010s 2d animated_skeleton arm_support artist_name blue_hoodie blue_jacket blue_tongue bottomless bottomless_male digital_media_(artwork) ectotongue hooded_jacket hoodie humanoid jacket male male_masturbation male_only masturbating_with_clothes masturbation monster off_shoulder off_shoulders one_eye_closed partially_clothed ryokutya1107 sans sans_(undertale) simple_background sitting skeleton sock sock_on_penis socks solo_male tongue tongue_out topwear topwear_only undead undertale undertale_(series) white_background
1:1 1:1_aspect_ratio 1boy 2010s 2d animated_skeleton arm_support artist_name blue_hoodie blue_jacket blue_tongue bottomless bottomless_male digital_media_(artwork) ectotongue hooded_jacket hoodie humanoid jacket male male_masturbation male_only masturbating_with_clothes masturbation monster off_shoulder off_shoulders one_eye_closed partially_clothed ryokutya1107 sans sans_(undertale) simple_background sitting skeleton sock sock_on_penis socks solo_male tongue tongue_out topwear topwear_only undead undertale undertale_(series) white_background
1girl 1girl aamana0 absurd_res adapted_costume animal_ears beach bikini bikini_under_clothes blue_eyes blue_hair breasts cameltoe choker collarbone commentary_request day earrings fake_animal_ears hair_between_eyes high_res hololive hood hood_up hoodie hoshimachi_suisei hoshimachi_suisei_(4th_costume) jewelry looking_at_viewer navel official_alternate_hair_length official_alternate_hairstyle open_clothes outside short_hair sleeves_past_wrists small_breasts smile standing stomach swimsuit virtual_youtuber
1girl 1girl aamana0 absurd_res adapted_costume animal_ears beach bikini bikini_under_clothes blue_eyes blue_hair breasts cameltoe choker collarbone commentary_request day earrings fake_animal_ears hair_between_eyes high_res hololive hood hood_up hoodie hoshimachi_suisei hoshimachi_suisei_(4th_costume) jewelry looking_at_viewer navel official_alternate_hair_length official_alternate_hairstyle open_clothes outside short_hair sleeves_past_wrists small_breasts smile standing stomach swimsuit virtual_youtuber
animated_skeleton blue_hoodie blue_jacket bottom_sans bottomless bottomless_male brown_hair chans_(ship) chara chara_(undertale) comic_sans doggy_position frans_(ship) glowing_eye hooded_jacket hoodie jacket lady_sudeley noncon nonconsensual pants_down penetration penetration_from_behind rape sans sans_(undertale) sex sex_from_behind skeleton tumblr_username uke_sans undertale undertale_(series) yaoi
animated_skeleton blue_hoodie blue_jacket bottom_sans bottomless bottomless_male brown_hair chans_(ship) chara chara_(undertale) comic_sans doggy_position frans_(ship) glowing_eye hooded_jacket hoodie jacket lady_sudeley noncon nonconsensual pants_down penetration penetration_from_behind rape sans sans_(undertale) sex sex_from_behind skeleton tumblr_username uke_sans undertale undertale_(series) yaoi
2boys animated_skeleton blue_hoodie blue_jacket blue_penis bottom_sans brown_hair closed_eyes comic_sans couch couch_sex dubious_consent ectopenis fellatio frans_(ship) frisk_(male)_(undertale) frisk_(undertale) hooded_jacket hoodie human human_penetrating jacket joke lady_sudeley male/male male_human male_only on_couch on_sofa penetrating_pov penetration penetrator_pov penis pun questionable_consent sans sans_(undertale) skeleton sofa tape tape_gag taped_mouth text tumblr_username uke_sans undertale undertale_(series) yaoi
2boys animated_skeleton blue_hoodie blue_jacket blue_penis bottom_sans brown_hair closed_eyes comic_sans couch couch_sex dubious_consent ectopenis fellatio frans_(ship) frisk_(male)_(undertale) frisk_(undertale) hooded_jacket hoodie human human_penetrating jacket joke lady_sudeley male/male male_human male_only on_couch on_sofa penetrating_pov penetration penetrator_pov penis pun questionable_consent sans sans_(undertale) skeleton sofa tape tape_gag taped_mouth text tumblr_username uke_sans undertale undertale_(series) yaoi
<3 ahegao animated_skeleton clothed cum_on_body drool english_text fangs heart heart-shaped_pupils heart_eyes hooded_jacket hoodie jacket moaning neetnest pleasure_face sans sans_(undertale) shirt_lift simple_background skeleton sweat tongue tongue_out tremble trembling undertale undertale_(series) white_background
<3 ahegao animated_skeleton clothed cum_on_body drool english_text fangs heart heart-shaped_pupils heart_eyes hooded_jacket hoodie jacket moaning neetnest pleasure_face sans sans_(undertale) shirt_lift simple_background skeleton sweat tongue tongue_out tremble trembling undertale undertale_(series) white_background
1boy 2010s 2016 2d 2d_(artwork) animated_skeleton blue_blush blush bottom_sans bulge clothed clothed_male clothing collar collar_and_leash digital_media_(artwork) drooling erection erection_under_clothes fully_clothed glowing glowing_genitalia hands_behind_head hooded_jacket hoodie itsdunklesans jacket leash leash_and_collar legs_apart male male_focus male_only malesub monster partially_colored sans sans_(undertale) simple_background skeleton slippers solo_male submissive submissive_male sweat uke_sans undead undertale undertale_(series) video_game_character video_games white_background
1boy 2010s 2016 2d 2d_(artwork) animated_skeleton blue_blush blush bottom_sans bulge clothed clothed_male clothing collar collar_and_leash digital_media_(artwork) drooling erection erection_under_clothes fully_clothed glowing glowing_genitalia hands_behind_head hooded_jacket hoodie itsdunklesans jacket leash leash_and_collar legs_apart male male_focus male_only malesub monster partially_colored sans sans_(undertale) simple_background skeleton slippers solo_male submissive submissive_male sweat uke_sans undead undertale undertale_(series) video_game_character video_games white_background
1boy 2020s 2022 animated_skeleton blush clothed drooling flustered hooded_jacket hoodie jacket looking_at_viewer male male_only monochrome monster off_shoulder opieopiopi pillow sans sans_(undertale) simple_background sitting skeleton socks solo solo_male sweat undead undertale undertale_(series)
1boy 2020s 2022 animated_skeleton blush clothed drooling flustered hooded_jacket hoodie jacket looking_at_viewer male male_only monochrome monster off_shoulder opieopiopi pillow sans sans_(undertale) simple_background sitting skeleton socks solo solo_male sweat undead undertale undertale_(series)
1boy 2d 2d_(artwork) animated_skeleton bound bound_wrists clothed digital_media_(artwork) ectotongue hooded_jacket hoodie jacket male monster sans sans_(undertale) simple_background skeleton submissive tied_up tied_wrists tongue tongue_out undead undertale undertale_(series) unknown_artist unknown_source video_games
1boy 2d 2d_(artwork) animated_skeleton bound bound_wrists clothed digital_media_(artwork) ectotongue hooded_jacket hoodie jacket male monster sans sans_(undertale) simple_background skeleton submissive tied_up tied_wrists tongue tongue_out undead undertale undertale_(series) unknown_artist unknown_source video_games
<3 1boy ahegao anal animated_skeleton blue_blush blue_dildo blue_tongue blush bottom_sans bottomless dildo ectotongue heart heart_eyes hooded_jacket hoodie jacket legs_apart legs_spread masturbation neetnest pleasure_face sans sans_(undertale) sex_toy skeleton solo spread_legs spreading tongue tongue_out uke_sans undertale undertale_(series) white_background
<3 1boy ahegao anal animated_skeleton blue_blush blue_dildo blue_tongue blush bottom_sans bottomless dildo ectotongue heart heart_eyes hooded_jacket hoodie jacket legs_apart legs_spread masturbation neetnest pleasure_face sans sans_(undertale) sex_toy skeleton solo spread_legs spreading tongue tongue_out uke_sans undertale undertale_(series) white_background
<3 animated_skeleton blue_blush blush bottom_sans crying gaster_blaster heart heart-shaped_pupils heart_eyes heart_pupils hooded_jacket hoodie in_heat jacket restrained sans sans_(undertale) simple_background skeleton soul soul_sex spread_legs thesourceofmysins tongue_out trembling uke_sans undertale undertale_(series) white_background
<3 animated_skeleton blue_blush blush bottom_sans crying gaster_blaster heart heart-shaped_pupils heart_eyes heart_pupils hooded_jacket hoodie in_heat jacket restrained sans sans_(undertale) simple_background skeleton soul soul_sex spread_legs thesourceofmysins tongue_out trembling uke_sans undertale undertale_(series) white_background
<3 animated_skeleton bigger_penetrating bigger_penetrating_smaller blue_blush blue_hoodie blue_jacket blue_tongue blush bottom_sans bottomless bottomless_male clothed gaster_blaster grey_background heart heart-shaped_pupils heart_eyes hooded_jacket hoodie huge_tongue in_heat jacket larger_penetrating larger_penetrating_smaller sans sans_(undertale) simple_background skeleton smaller_penetrated sweat thesourceofmysins tongue tongue_fuck tongue_fucking tongue_out tongue_penetration uke_sans undertale undertale_(series)
<3 animated_skeleton bigger_penetrating bigger_penetrating_smaller blue_blush blue_hoodie blue_jacket blue_tongue blush bottom_sans bottomless bottomless_male clothed gaster_blaster grey_background heart heart-shaped_pupils heart_eyes hooded_jacket hoodie huge_tongue in_heat jacket larger_penetrating larger_penetrating_smaller sans sans_(undertale) simple_background skeleton smaller_penetrated sweat thesourceofmysins tongue tongue_fuck tongue_fucking tongue_out tongue_penetration uke_sans undertale undertale_(series)
1cuntboy animated_skeleton anonymous_male blue_pussy blue_vagina blush bottom_sans cum cum_in_pussy cum_inside cuntboy cuntboy_focus cuntboy_penetrated disembodied_penis ectopussy grey_penis hooded_jacket hoodie jacket male male/cuntboy penetration pussy sans sans_(undertale) skeleton solo_focus source_request sweat trembling uke_sans undertale undertale_(series) vaginal_penetration
1cuntboy animated_skeleton anonymous_male blue_pussy blue_vagina blush bottom_sans cum cum_in_pussy cum_inside cuntboy cuntboy_focus cuntboy_penetrated disembodied_penis ectopussy grey_penis hooded_jacket hoodie jacket male male/cuntboy penetration pussy sans sans_(undertale) skeleton solo_focus source_request sweat trembling uke_sans undertale undertale_(series) vaginal_penetration
1cuntboy animated_skeleton anonymous_male blue_pussy blue_vagina blush bottom_sans cuntboy cuntboy_focus cuntboy_penetrated disembodied_penis ectopussy grey_penis hooded_jacket hoodie jacket male male/cuntboy penetrating penetrating_pussy penetration pussy sans sans_(undertale) skeleton solo_focus source_request uke_sans undertale undertale_(series) vaginal_penetration
1cuntboy animated_skeleton anonymous_male blue_pussy blue_vagina blush bottom_sans cuntboy cuntboy_focus cuntboy_penetrated disembodied_penis ectopussy grey_penis hooded_jacket hoodie jacket male male/cuntboy penetrating penetrating_pussy penetration pussy sans sans_(undertale) skeleton solo_focus source_request uke_sans undertale undertale_(series) vaginal_penetration
1cuntboy animated_skeleton blue_blush blue_pussy blue_vagina blush ectopussy hooded_jacket hoodie jacket pussy pussy sans sans_(undertale) skeleton source_request spread_legs undertale undertale_(series)
1cuntboy animated_skeleton blue_blush blue_pussy blue_vagina blush ectopussy hooded_jacket hoodie jacket pussy pussy sans sans_(undertale) skeleton source_request spread_legs undertale undertale_(series)
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name begging begging_to_cum black_background blue_cum blue_penis blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel cum digital_media_(artwork) dominant dominant_male domination drooling duo echoheartx ectopenis ectotongue ejaculation elegantfolly english_text fontcest fully_clothed fully_clothed_male gay gloves handjob hooded_jacket hoodie incest jacket laying_on_back lying_on_back male male/male male_only maledom malesub monochrome monster orange_cum orange_penis orgasm papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis sans sans_(undertale) seme_papyrus semen_on_face sequence sequential skeleton submissive submissive_male tentacle_penis text tongue top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name begging begging_to_cum black_background blue_cum blue_penis blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel cum digital_media_(artwork) dominant dominant_male domination drooling duo echoheartx ectopenis ectotongue ejaculation elegantfolly english_text fontcest fully_clothed fully_clothed_male gay gloves handjob hooded_jacket hoodie incest jacket laying_on_back lying_on_back male male/male male_only maledom malesub monochrome monster orange_cum orange_penis orgasm papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis sans sans_(undertale) seme_papyrus semen_on_face sequence sequential skeleton submissive submissive_male tentacle_penis text tongue top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blue_penis blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel couch cum cum_on_face digital_media_(artwork) dirty_talk dominant dominant_male domination duo echoheartx ectopenis elegantfolly english_text fontcest fully_clothed fully_clothed_male gay gloves handjob hooded_jacket hoodie incest jacket kicking kicking_another male male/male male_only maledom malesub monochrome monster orange_cum orange_penis papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis sans sans_(undertale) seme_papyrus semen_on_face sequence sequential skeleton sofa submissive submissive_male tentacle_penis text top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blue_penis blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel couch cum cum_on_face digital_media_(artwork) dirty_talk dominant dominant_male domination duo echoheartx ectopenis elegantfolly english_text fontcest fully_clothed fully_clothed_male gay gloves handjob hooded_jacket hoodie incest jacket kicking kicking_another male male/male male_only maledom malesub monochrome monster orange_cum orange_penis papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis sans sans_(undertale) seme_papyrus semen_on_face sequence sequential skeleton sofa submissive submissive_male tentacle_penis text top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
... 2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel cum cum_on_face cumshot digital_media_(artwork) dirty_talk dominant dominant_male domination dubious_consent duo echoheartx ectopenis ectotongue ejaculation elegantfolly english_text fellatio fontcest fully_clothed fully_clothed_male gay gloves grabbing_head head_grab hooded_jacket hoodie incest jacket licking_penis male male/male male_only maledom malesub monochrome monster oral orange_cum orange_penis orange_tongue orgasm papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis sans sans_(undertale) seme_papyrus semen_on_face sequence sequential skeleton submissive submissive_male sweat tentacle_penis text tongue top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
... 2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel cum cum_on_face cumshot digital_media_(artwork) dirty_talk dominant dominant_male domination dubious_consent duo echoheartx ectopenis ectotongue ejaculation elegantfolly english_text fellatio fontcest fully_clothed fully_clothed_male gay gloves grabbing_head head_grab hooded_jacket hoodie incest jacket licking_penis male male/male male_only maledom malesub monochrome monster oral orange_cum orange_penis orange_tongue orgasm papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis sans sans_(undertale) seme_papyrus semen_on_face sequence sequential skeleton submissive submissive_male sweat tentacle_penis text tongue top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel digital_media_(artwork) dirty_talk dominant dominant_male domination dubious_consent duo echoheartx ectopenis ectotongue elegantfolly english_text fellatio fontcest fully_clothed fully_clothed_male gay gloves grabbing_head head_grab hooded_jacket hoodie incest jacket licking_penis male male/male male_only maledom malesub monochrome monster oral orange_penis orange_tongue papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis profanity sans sans_(undertale) seme_papyrus sequence sequential sitting skeleton submissive submissive_male tentacle_penis text tongue top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel digital_media_(artwork) dirty_talk dominant dominant_male domination dubious_consent duo echoheartx ectopenis ectotongue elegantfolly english_text fellatio fontcest fully_clothed fully_clothed_male gay gloves grabbing_head head_grab hooded_jacket hoodie incest jacket licking_penis male male/male male_only maledom malesub monochrome monster oral orange_penis orange_tongue papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis profanity sans sans_(undertale) seme_papyrus sequence sequential sitting skeleton submissive submissive_male tentacle_penis text tongue top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel digital_media_(artwork) dirty_talk dominant dominant_male domination dubious_consent duo echoheartx ectopenis ectotongue elegantfolly english_text fellatio fontcest fully_clothed fully_clothed_male gay gloves grabbing_head head_grab hooded_jacket hoodie incest jacket licking_penis male male/male male_only maledom malesub monochrome monster oral orange_penis orange_tongue papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis profanity sans sans_(undertale) seme_papyrus sequence sequential sitting skeleton submissive submissive_male tentacle_penis text tongue top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel digital_media_(artwork) dirty_talk dominant dominant_male domination dubious_consent duo echoheartx ectopenis ectotongue elegantfolly english_text fellatio fontcest fully_clothed fully_clothed_male gay gloves grabbing_head head_grab hooded_jacket hoodie incest jacket licking_penis male male/male male_only maledom malesub monochrome monster oral orange_penis orange_tongue papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis profanity sans sans_(undertale) seme_papyrus sequence sequential sitting skeleton submissive submissive_male tentacle_penis text tongue top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel couch digital_media_(artwork) dominant dominant_male domination duo echoheartx ectopenis elegantfolly english_text fontcest fully_clothed fully_clothed_male gloves grabbing_head head_grab hooded_jacket hoodie imminent_fellatio imminent_incest imminent_oral incest jacket male male/male male_only maledom malesub monochrome monster orange_penis papyrus papyrus_(undertale) papysans partially_colored penis penis_on_face prehensile_penis sans sans_(undertale) seme_papyrus sequence sequential sitting sitting_on_couch sitting_on_sofa skeleton sofa submissive submissive_male tentacle_penis text top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel couch digital_media_(artwork) dominant dominant_male domination duo echoheartx ectopenis elegantfolly english_text fontcest fully_clothed fully_clothed_male gloves grabbing_head head_grab hooded_jacket hoodie imminent_fellatio imminent_incest imminent_oral incest jacket male male/male male_only maledom malesub monochrome monster orange_penis papyrus papyrus_(undertale) papysans partially_colored penis penis_on_face prehensile_penis sans sans_(undertale) seme_papyrus sequence sequential sitting sitting_on_couch sitting_on_sofa skeleton sofa submissive submissive_male tentacle_penis text top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel couch digital_media_(artwork) dominant dominant_male domination duo echoheartx ectopenis elegantfolly english_text fontcest fully_clothed fully_clothed_male gloves grabbing_head head_grab hooded_jacket hoodie imminent_fellatio imminent_incest imminent_oral incest jacket male male/male male_only maledom malesub monochrome monster orange_penis papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis sans sans_(undertale) seme_papyrus sequence sequential sitting sitting_on_couch sitting_on_sofa skeleton sofa submissive submissive_male tentacle_penis text top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel couch digital_media_(artwork) dominant dominant_male domination duo echoheartx ectopenis elegantfolly english_text fontcest fully_clothed fully_clothed_male gloves grabbing_head head_grab hooded_jacket hoodie imminent_fellatio imminent_incest imminent_oral incest jacket male male/male male_only maledom malesub monochrome monster orange_penis papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis sans sans_(undertale) seme_papyrus sequence sequential sitting sitting_on_couch sitting_on_sofa skeleton sofa submissive submissive_male tentacle_penis text top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
1cuntboy 2017 2d animated_skeleton artist_name back_view bottom_sans bottomless bottomless_cuntboy cuntboy cuntboy_focus cuntboy_penetrated cuntboysub digital_media ectopussy heart_eyes hooded_jacket hoodie jacket kneel kneeling laddinger lineart looking_at_viewer looking_back looking_back_at_viewer male monster partially_colored penetration pussy rear_view sans_(undertale) sex simple_background skeleton solo_focus submissive submissive_cuntboy teeth trembling undead undertale undertale_(series) vaginal vaginal_penetration vaginal_sex video_game_character video_games visible_breath white_background
1cuntboy 2017 2d animated_skeleton artist_name back_view bottom_sans bottomless bottomless_cuntboy cuntboy cuntboy_focus cuntboy_penetrated cuntboysub digital_media ectopussy heart_eyes hooded_jacket hoodie jacket kneel kneeling laddinger lineart looking_at_viewer looking_back looking_back_at_viewer male monster partially_colored penetration pussy rear_view sans_(undertale) sex simple_background skeleton solo_focus submissive submissive_cuntboy teeth trembling undead undertale undertale_(series) vaginal vaginal_penetration vaginal_sex video_game_character video_games visible_breath white_background
2020s 2022 2boys animated_skeleton arm_around_another's_neck arm_around_neck arm_around_shoulder beach blue_hoodie blue_jacket blush brothers clothed duo fontcest gay hooded_jacket hoodie humanoid incest intraspecies jacket kissing making_out male male/male male_only monster monster_boy night outdoors papyrus papyrus_(undertale) papysans s2ames2 sans sans_(undertale) scarf sibling_incest siblings skeleton undead undertale undertale_(series) water yaoi
2020s 2022 2boys animated_skeleton arm_around_another's_neck arm_around_neck arm_around_shoulder beach blue_hoodie blue_jacket blush brothers clothed duo fontcest gay hooded_jacket hoodie humanoid incest intraspecies jacket kissing making_out male male/male male_only monster monster_boy night outdoors papyrus papyrus_(undertale) papysans s2ames2 sans sans_(undertale) scarf sibling_incest siblings skeleton undead undertale undertale_(series) water yaoi
2020s 2022 2boys animated_skeleton blue_hoodie blue_jacket blush brothers chocolate clothed duo fontcest food food_in_mouth gay gift gift_box grabbing_clothing hooded_jacket hoodie humanoid incest intraspecies jacket male male/male male_only monster monster_boy papyrus papyrus_(undertale) papysans s2ames2 sans sans_(undertale) scarf sibling_incest siblings skeleton undead undertale undertale_(series) valentine's_day yaoi
2020s 2022 2boys animated_skeleton blue_hoodie blue_jacket blush brothers chocolate clothed duo fontcest food food_in_mouth gay gift gift_box grabbing_clothing hooded_jacket hoodie humanoid incest intraspecies jacket male male/male male_only monster monster_boy papyrus papyrus_(undertale) papysans s2ames2 sans sans_(undertale) scarf sibling_incest siblings skeleton undead undertale undertale_(series) valentine's_day yaoi
2020s 2022 2boys animated_skeleton blue_hoodie blue_jacket blush brothers clothed duo ectotongue fontcest gay hooded_jacket hoodie humanoid incest intraspecies jacket kissing male male/male male_only monster monster_boy papyrus papyrus_(undertale) papysans s2ames2 saliva saliva_trail sans sans_(undertale) scarf sibling_incest siblings skeleton tongue undead undertale undertale_(series) upper_body yaoi
2020s 2022 2boys animated_skeleton blue_hoodie blue_jacket blush brothers clothed duo ectotongue fontcest gay hooded_jacket hoodie humanoid incest intraspecies jacket kissing male male/male male_only monster monster_boy papyrus papyrus_(undertale) papysans s2ames2 saliva saliva_trail sans sans_(undertale) scarf sibling_incest siblings skeleton tongue undead undertale undertale_(series) upper_body yaoi
2020s 2022 2boys animated_skeleton arms_around_another arms_around_another's_neck arms_around_neck arms_around_partner arms_around_waist blue_blush blue_hoodie blue_jacket blue_tongue blush brothers clothed duo ectotongue fontcest gay hooded_jacket hoodie hugging humanoid incest intraspecies jacket kissing licking_tongue making_out male male/male male_only monster monster_boy papyrus papyrus_(undertale) papysans red_tongue s2ames2 sans sans_(undertale) scarf sibling_incest siblings skeleton tongue undead undertale undertale_(series) yaoi
2020s 2022 2boys animated_skeleton arms_around_another arms_around_another's_neck arms_around_neck arms_around_partner arms_around_waist blue_blush blue_hoodie blue_jacket blue_tongue blush brothers clothed duo ectotongue fontcest gay hooded_jacket hoodie hugging humanoid incest intraspecies jacket kissing licking_tongue making_out male male/male male_only monster monster_boy papyrus papyrus_(undertale) papysans red_tongue s2ames2 sans sans_(undertale) scarf sibling_incest siblings skeleton tongue undead undertale undertale_(series) yaoi
2010s 2018 2boys 2d 2d_(artwork) 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_hoodie blue_jacket blue_tongue bottom_sans bottomless brother brother/brother brother_and_brother brother_penetrating_brother brothers chain chains clothed crying crying_with_eyes_open digital_media_(artwork) dominant dominant_male domination duo ectopenis ectoplasm ectotongue fontcest ganzooky gay genitals gradient_background hooded_jacket hoodie incest intraspecies jacket larger_male larger_penetrating larger_penetrating_smaller male male/male male_penetrated male_penetrating male_penetrating_male maledom monster monster_boy non-con non-consensual noncon nonconsensual nsfwsinningsans open_mouth orange_background orange_penis papyrus papyrus_(undertale) papysans penetration penis rape red_gloves red_scarf sans sans_(undertale) scarf seme_papyrus sex sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom submissive sweat tears top_papyrus tumblr_username uke_sans undead undertale undertale_(series) video_game_character video_games yandere yaoi
2010s 2018 2boys 2d 2d_(artwork) 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_hoodie blue_jacket blue_tongue bottom_sans bottomless brother brother/brother brother_and_brother brother_penetrating_brother brothers chain chains clothed crying crying_with_eyes_open digital_media_(artwork) dominant dominant_male domination duo ectopenis ectoplasm ectotongue fontcest ganzooky gay genitals gradient_background hooded_jacket hoodie incest intraspecies jacket larger_male larger_penetrating larger_penetrating_smaller male male/male male_penetrated male_penetrating male_penetrating_male maledom monster monster_boy non-con non-consensual noncon nonconsensual nsfwsinningsans open_mouth orange_background orange_penis papyrus papyrus_(undertale) papysans penetration penis rape red_gloves red_scarf sans sans_(undertale) scarf seme_papyrus sex sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom submissive sweat tears top_papyrus tumblr_username uke_sans undead undertale undertale_(series) video_game_character video_games yandere yaoi
2023 2boys 2d animated_skeleton black_background blindfold blindfolded blue_hoodie blue_jacket bound brother/brother brothers bruise bruises clothed covering_another's_eyes covering_eyes dark_background digital_media dominant dominant_male domination duo fontcest gloves hooded_jacket hoodie incest injury jacket kidnapped male male/male male_only maledom papyrus_(undertale) papysans red_gloves restrained restraints rope rope_bondage s2ames2 sans_(undertale) siblings skeleton submissive submissive_male teeth tied_up undead undertale undertale_(series) yandere yaoi
2023 2boys 2d animated_skeleton black_background blindfold blindfolded blue_hoodie blue_jacket bound brother/brother brothers bruise bruises clothed covering_another's_eyes covering_eyes dark_background digital_media dominant dominant_male domination duo fontcest gloves hooded_jacket hoodie incest injury jacket kidnapped male male/male male_only maledom papyrus_(undertale) papysans red_gloves restrained restraints rope rope_bondage s2ames2 sans_(undertale) siblings skeleton submissive submissive_male teeth tied_up undead undertale undertale_(series) yandere yaoi
1:1 1:1_aspect_ratio 1girl 2020s 2023 2d 2d_(artwork) after_sex animated_skeleton belly blue_belly blue_body blue_breasts blue_clitoris blue_hoodie blue_nipples blue_pussy bottom_sans breasts clitoris digital_media_(artwork) ectobelly ectobody ectobreasts ectopussy exposed_breasts exposed_pussy female female_only female_sans fluids genderswap genderswap_(mtf) hoodie ketchup ketchup_bottle leaking_pussy legs_apart legs_spread mellouwana monster navel nipples pussy rule_63 sans sans_(undertale) shirt_up skeleton socks solo solo_female uke_sans undead undertale undertale_(series) video_games wasted
1:1 1:1_aspect_ratio 1girl 2020s 2023 2d 2d_(artwork) after_sex animated_skeleton belly blue_belly blue_body blue_breasts blue_clitoris blue_hoodie blue_nipples blue_pussy bottom_sans breasts clitoris digital_media_(artwork) ectobelly ectobody ectobreasts ectopussy exposed_breasts exposed_pussy female female_only female_sans fluids genderswap genderswap_(mtf) hoodie ketchup ketchup_bottle leaking_pussy legs_apart legs_spread mellouwana monster navel nipples pussy rule_63 sans sans_(undertale) shirt_up skeleton socks solo solo_female uke_sans undead undertale undertale_(series) video_games wasted