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1boy 2d 2d_(artwork) animated_skeleton artist_request blue_blush blue_penis blush clothed digital_media_(artwork) drooling ectopenis exposed_penis genitals hooded_jacket hoodie jacket male male_only monochrome monster monster_boy partially_colored penis sans sans_(undertale) skeleton sketch sleeping solo_male undead undertale undertale_(series) upside-down upside_down video_game_character video_games zzz
1boy 2d 2d_(artwork) animated_skeleton artist_request blue_blush blue_penis blush clothed digital_media_(artwork) drooling ectopenis exposed_penis genitals hooded_jacket hoodie jacket male male_only monochrome monster monster_boy partially_colored penis sans sans_(undertale) skeleton sketch sleeping solo_male undead undertale undertale_(series) upside-down upside_down video_game_character video_games zzz
1boy 2010s 2015 2d 2d_(artwork) animated_skeleton artist_name blue_blush blue_eyes blue_hoodie blue_jacket blue_penis blush burger clothed clothed_male clothing digital_media_(artwork) eating eating_food ectopenis food french_fries fries fully_clothed genital_fluids genitals grabbing_own_penis hamburger heart-shaped_pupils heart_eyes hooded_jacket hoodie humanoid jacket ketchup ketchup_bottle male male_masturbation male_only masturbation monster monster_boy penile penile_masturbation penis penis_out precum red_background sans sans_(undertale) simple_background skeleton slimesurgeon solo_male undead undertale undertale_(series) video_game_character video_games
1boy 2010s 2015 2d 2d_(artwork) animated_skeleton artist_name blue_blush blue_eyes blue_hoodie blue_jacket blue_penis blush burger clothed clothed_male clothing digital_media_(artwork) eating eating_food ectopenis food french_fries fries fully_clothed genital_fluids genitals grabbing_own_penis hamburger heart-shaped_pupils heart_eyes hooded_jacket hoodie humanoid jacket ketchup ketchup_bottle male male_masturbation male_only masturbation monster monster_boy penile penile_masturbation penis penis_out precum red_background sans sans_(undertale) simple_background skeleton slimesurgeon solo_male undead undertale undertale_(series) video_game_character video_games
1boy 2d 2d_(artwork) animated_skeleton artist_request blue_blush blue_eye blue_hoodie blue_jacket blue_penis blush bottom_sans clothed clothed_male clothing digital_media_(artwork) ectopenis glowing glowing_eye hooded_jacket hoodie jacket male male_only monster monster_boy penis penis_out sans sans_(undertale) simple_background sitting skeleton solid_color_background solo_male spread_legs sweat uke_sans undead undertale undertale_(series) video_game_character video_games
1boy 2d 2d_(artwork) animated_skeleton artist_request blue_blush blue_eye blue_hoodie blue_jacket blue_penis blush bottom_sans clothed clothed_male clothing digital_media_(artwork) ectopenis glowing glowing_eye hooded_jacket hoodie jacket male male_only monster monster_boy penis penis_out sans sans_(undertale) simple_background sitting skeleton solid_color_background solo_male spread_legs sweat uke_sans undead undertale undertale_(series) video_game_character video_games
1:1 1:1_aspect_ratio 2010s 2015 2d 2d_(artwork) 3boys animated_skeleton assisted_fellatio assisted_sex blue_penis blue_tongue bondage bottom_sans bound brothers digital_media_(artwork) ectopenis flowans flowey_the_flower flowsans fontcest gay genitals goopynoms imminent_fellatio imminent_oral incest male male/male male_only monochrome monster mouth_forced_open orange_penis papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus skeleton tongue_out top_papyrus trio uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
1:1 1:1_aspect_ratio 2010s 2015 2d 2d_(artwork) 3boys animated_skeleton assisted_fellatio assisted_sex blue_penis blue_tongue bondage bottom_sans bound brothers digital_media_(artwork) ectopenis flowans flowey_the_flower flowsans fontcest gay genitals goopynoms imminent_fellatio imminent_oral incest male male/male male_only monochrome monster mouth_forced_open orange_penis papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus skeleton tongue_out top_papyrus trio uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
1boy animated_skeleton blue_blush blue_penis blush ectopenis hooded_jacket hoodie jacket looking_at_viewer male male_only monochrome monster penis penis_out sans sans_(undertale) skeleton solo solo_male sweat taking_off_clothes undead undertale undertale_(series) white_background
1boy animated_skeleton blue_blush blue_penis blush ectopenis hooded_jacket hoodie jacket looking_at_viewer male male_only monochrome monster penis penis_out sans sans_(undertale) skeleton solo solo_male sweat taking_off_clothes undead undertale undertale_(series) white_background
1:1 1:1_aspect_ratio 2010s 2015 2d 2d_(artwork) 3boys animated_skeleton assisted_fellatio assisted_sex blue_penis blue_tongue bondage bottom_sans bound brothers digital_media_(artwork) ectopenis flowans flowey_the_flower flowsans fontcest gay goopynoms imminent_fellatio incest male male/male male/male/male male_only monochrome monster mouth_forced_open orange_penis papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sex skeleton tongue_out top_papyrus trio uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
1:1 1:1_aspect_ratio 2010s 2015 2d 2d_(artwork) 3boys animated_skeleton assisted_fellatio assisted_sex blue_penis blue_tongue bondage bottom_sans bound brothers digital_media_(artwork) ectopenis flowans flowey_the_flower flowsans fontcest gay goopynoms imminent_fellatio incest male male/male male/male/male male_only monochrome monster mouth_forced_open orange_penis papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sex skeleton tongue_out top_papyrus trio uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
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
2022 2boys alternate_version_available animated_skeleton artist_logo bedroom blue_blush blue_penis blush bone brothers chair clothed commission computer desk drawer duo ectopenis excessive_precum floor fontcest ganzooky genital_fluids genitals grabbing_own_penis implied_incest implied_yaoi indoors lamp male male_masturbation male_only masturbating_with_clothes masturbation monster night nsfwsinningsans orange_blush orange_penis papyrus_(undertale) papysans penile penile_masturbation penis precum sans_(undertale) siblings sitting sitting_on_floor skeleton sniffing_clothes socks swivel_chair undead undertale undertale_(series) variant_set video_games window
2022 2boys alternate_version_available animated_skeleton artist_logo bedroom blue_blush blue_penis blush bone brothers chair clothed commission computer desk drawer duo ectopenis excessive_precum floor fontcest ganzooky genital_fluids genitals grabbing_own_penis implied_incest implied_yaoi indoors lamp male male_masturbation male_only masturbating_with_clothes masturbation monster night nsfwsinningsans orange_blush orange_penis papyrus_(undertale) papysans penile penile_masturbation penis precum sans_(undertale) siblings sitting sitting_on_floor skeleton sniffing_clothes socks swivel_chair undead undertale undertale_(series) variant_set video_games window
2022 2boys alternate_version_available animated_skeleton artist_logo bedroom blue_blush blue_penis blush bone brothers chair clothed commissio computer desk drawer duo ectopenis excessive_precum floor fontcest ganzooky genital_fluids genitals grabbing_own_penis implied_incest implied_yaoi indoors lamp male male_masturbation male_only masturbating_with_clothes masturbation monster nsfwsinningsans orange_blush orange_penis papyrus_(undertale) papysans penile penile_masturbation penis precum sans_(undertale) siblings sitting sitting_on_floor skeleton sniffing_clothes socks sunset swivel_chair undead undertale undertale_(series) variant_set video_games window
2022 2boys alternate_version_available animated_skeleton artist_logo bedroom blue_blush blue_penis blush bone brothers chair clothed commissio computer desk drawer duo ectopenis excessive_precum floor fontcest ganzooky genital_fluids genitals grabbing_own_penis implied_incest implied_yaoi indoors lamp male male_masturbation male_only masturbating_with_clothes masturbation monster nsfwsinningsans orange_blush orange_penis papyrus_(undertale) papysans penile penile_masturbation penis precum sans_(undertale) siblings sitting sitting_on_floor skeleton sniffing_clothes socks sunset swivel_chair undead undertale undertale_(series) variant_set video_games window
1boy 2010s 2018 aliasing anal anal_masturbation autoanilingus autorimjob balls belly big_belly biped blue_balls blue_body blue_glans blue_penis blue_testicles blue_tongue clothing colored_sketch crown darkner deltarune deltarune_chapter_1 dr-sawboners drooling erection eyeless first_porn_of_character footwear front_view frown glans grey_background hand_on_leg humanoid humanoid_penis king king_spade long_tongue looking_pleasured male male_only masturbation moobs mostly_nude open_frown open_mouth open_smile oral overweight overweight_male penis plantigrade precum raised_leg reclining rimjob royalty saliva sharp_teeth shoes signature simple_background sitting smile solo solo_male spade stomach_mouth suit_symbol sweat teeth testicle testicles tongue tongue_out two_tone_body undertale_(series) veins veiny_penis video_games white_body white_tongue
1boy 2010s 2018 aliasing anal anal_masturbation autoanilingus autorimjob balls belly big_belly biped blue_balls blue_body blue_glans blue_penis blue_testicles blue_tongue clothing colored_sketch crown darkner deltarune deltarune_chapter_1 dr-sawboners drooling erection eyeless first_porn_of_character footwear front_view frown glans grey_background hand_on_leg humanoid humanoid_penis king king_spade long_tongue looking_pleasured male male_only masturbation moobs mostly_nude open_frown open_mouth open_smile oral overweight overweight_male penis plantigrade precum raised_leg reclining rimjob royalty saliva sharp_teeth shoes signature simple_background sitting smile solo solo_male spade stomach_mouth suit_symbol sweat teeth testicle testicles tongue tongue_out two_tone_body undertale_(series) veins veiny_penis video_games white_body white_tongue
2010s 2016 2boys 2d 2d_(artwork) anal animated_skeleton artist_name big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_penetrating bigger_penetrating_smaller black_border blue_blush blue_penis blue_tongue blush bottom_sans bottomless brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothed_male cum cum_string cum_while_penetrated cum_while_penetrating cumming_together cumshot digital_media_(artwork) drooling duo ectopenis ectotongue ejaculation ejaculation_while_penetrated fontcest fully_clothed fully_clothed_male gay gay_sex genital_fluids genitals gloves heki_(miss60250) hooded_jacket hoodie incest intraspecies larger_penetrating larger_penetrating_smaller leg_grab leg_held_up legs_apart male male/male male_only male_penetrating_male monster monster_boy orange_blush orange_penis orgasm papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penis red_gloves saliva sans sans_(undertale) seme_papyrus sex shirt_up sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom spread_legs submissive tears third-party_source tongue tongue_out top_papyrus tumblr twitter uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2016 2boys 2d 2d_(artwork) anal animated_skeleton artist_name big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_penetrating bigger_penetrating_smaller black_border blue_blush blue_penis blue_tongue blush bottom_sans bottomless brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothed_male cum cum_string cum_while_penetrated cum_while_penetrating cumming_together cumshot digital_media_(artwork) drooling duo ectopenis ectotongue ejaculation ejaculation_while_penetrated fontcest fully_clothed fully_clothed_male gay gay_sex genital_fluids genitals gloves heki_(miss60250) hooded_jacket hoodie incest intraspecies larger_penetrating larger_penetrating_smaller leg_grab leg_held_up legs_apart male male/male male_only male_penetrating_male monster monster_boy orange_blush orange_penis orgasm papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penis red_gloves saliva sans sans_(undertale) seme_papyrus sex shirt_up sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom spread_legs submissive tears third-party_source tongue tongue_out top_papyrus tumblr twitter uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2015 2boys 2d 2d_(artwork) animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_background blue_penis bottom_sans brother_penetrating_brother brothers clothed clothed/nude digital_media_(artwork) duo duplicate ectopenis fontcest gay grabbing_from_behind grabbing_mouth incest larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy noxiousaberration nude open_mouth orange_penis papyrus papyrus_(undertale) papysans penis sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom solo_focus tongue tongue_grab tongue_out top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
2010s 2015 2boys 2d 2d_(artwork) animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_background blue_penis bottom_sans brother_penetrating_brother brothers clothed clothed/nude digital_media_(artwork) duo duplicate ectopenis fontcest gay grabbing_from_behind grabbing_mouth incest larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy noxiousaberration nude open_mouth orange_penis papyrus papyrus_(undertale) papysans penis sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom solo_focus tongue tongue_grab tongue_out top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
2010s 2015 2boys 2d 2d_(artwork) animated_skeleton artist_request blue_blush blue_penis blush bottom_sans brother_penetrating_brother brothers cum_while_penetrated digital_media_(artwork) ectopenis fontcest gay humanoid incest male male/male male_focus male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy nude nude_male orange_penis papyrus papyrus_(undertale) papysans penis sans sans_(undertale) seme_papyrus skeleton sketch solo_focus third-party_source top_papyrus uke_sans undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games yaoi
2010s 2015 2boys 2d 2d_(artwork) animated_skeleton artist_request blue_blush blue_penis blush bottom_sans brother_penetrating_brother brothers cum_while_penetrated digital_media_(artwork) ectopenis fontcest gay humanoid incest male male/male male_focus male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy nude nude_male orange_penis papyrus papyrus_(undertale) papysans penis sans sans_(undertale) seme_papyrus skeleton sketch solo_focus third-party_source top_papyrus uke_sans undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games yaoi
2boys 2d 2d_(artwork) animated_skeleton artist_name blanket blue_blush blue_eyes blue_penis brothers clothed counch covering_own_mouth digital_media_(artwork) duo ectopenis fontcest ganzooky handjob incest indoors male male/male male_only monster nsfwsinningsans orange_eyes papyrus papyrus_(undertale) papysans penis sans sans_(undertale) sitting sitting_on_lap skeleton undead undertale undertale_(series) undertale_fanfiction video_game_character video_games watching_tv yaoi
2boys 2d 2d_(artwork) animated_skeleton artist_name blanket blue_blush blue_eyes blue_penis brothers clothed counch covering_own_mouth digital_media_(artwork) duo ectopenis fontcest ganzooky handjob incest indoors male male/male male_only monster nsfwsinningsans orange_eyes papyrus papyrus_(undertale) papysans penis sans sans_(undertale) sitting sitting_on_lap skeleton undead undertale undertale_(series) undertale_fanfiction video_game_character video_games watching_tv yaoi
2023 2boys 2d 2d_(artwork) animated_skeleton bad_id bad_twitter_id bedroom blue_blush blue_hoodie blue_jacket blue_penis blush boots bottom_on_top bottom_sans brothers clothed dark dark_room digital_media_(artwork) duo erection erection_under_clothes fontcest fudanshipochoc gay glowing heart heart_eyes hooded_jacket hoodie imminent_sex incest indoors jacket male male/male male_only male_pov monster off_shoulder one_eye_closed orange_penis papyrus papyrus_(undertale) papysans partial_male penis_bulge pov power_bottom red_boots sans sans_(undertale) seductive seme_papyrus skeleton solo_focus top_papyrus touching_crotch twitter uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
2023 2boys 2d 2d_(artwork) animated_skeleton bad_id bad_twitter_id bedroom blue_blush blue_hoodie blue_jacket blue_penis blush boots bottom_on_top bottom_sans brothers clothed dark dark_room digital_media_(artwork) duo erection erection_under_clothes fontcest fudanshipochoc gay glowing heart heart_eyes hooded_jacket hoodie imminent_sex incest indoors jacket male male/male male_only male_pov monster off_shoulder one_eye_closed orange_penis papyrus papyrus_(undertale) papysans partial_male penis_bulge pov power_bottom red_boots sans sans_(undertale) seductive seme_papyrus skeleton solo_focus top_papyrus touching_crotch twitter uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
2010s 2018 2d 2d_(artwork) 3boys animated_skeleton blue_penis bottom_sans clothed cyan_penis digital_media_(artwork) fellatio male male/male male_focus male_only monster multiple_views nsfwgarbagedump nude red_penis sans sans_(undertale) skeleton solo_focus sucking_penis uke_sans undead undertale undertale_(series) unseen_character unseen_male_face upper_body white_background yaoi
2010s 2018 2d 2d_(artwork) 3boys animated_skeleton blue_penis bottom_sans clothed cyan_penis digital_media_(artwork) fellatio male male/male male_focus male_only monster multiple_views nsfwgarbagedump nude red_penis sans sans_(undertale) skeleton solo_focus sucking_penis uke_sans undead undertale undertale_(series) unseen_character unseen_male_face upper_body white_background yaoi
1boy 2010s 2d 2d_(artwork) animated_skeleton blue_blush blue_penis blush bondage bottom_sans bound_arms bound_legs bound_penis clothed digital_media_(artwork) dubnyangg ectopenis finger male malesub micro micro_male microphilia monster monster_boy penis pink_ribbon ribbon ribbon_bondage ribbon_on_penis sans sans_(undertale) skeleton smaller_male solo_focus solo_male submissive submissive_male tears tied_arms tied_legs tied_penis tied_up uke_sans undead undertale undertale_(series) video_game_character video_games white_background
1boy 2010s 2d 2d_(artwork) animated_skeleton blue_blush blue_penis blush bondage bottom_sans bound_arms bound_legs bound_penis clothed digital_media_(artwork) dubnyangg ectopenis finger male malesub micro micro_male microphilia monster monster_boy penis pink_ribbon ribbon ribbon_bondage ribbon_on_penis sans sans_(undertale) skeleton smaller_male solo_focus solo_male submissive submissive_male tears tied_arms tied_legs tied_penis tied_up uke_sans undead undertale undertale_(series) video_game_character video_games white_background
1boy 2010s 2016 2d 2d_(artwork) animated_skeleton blue_blush blue_penis blush bondage bottom_sans bound_arms bound_legs bound_penis clothed digital_media_(artwork) dubnyangg ectopenis finger implied_female male male_focus malesub micro micro_male microphilia monster monster_boy penis pink_ribbon ribbon ribbon_bondage ribbon_on_penis sans sans_(undertale) skeleton smaller_male solo_focus solo_male submissive submissive_male tied_arms tied_legs tied_penis tied_up uke_sans undead undertale undertale_(series) video_game_character video_games white_background
1boy 2010s 2016 2d 2d_(artwork) animated_skeleton blue_blush blue_penis blush bondage bottom_sans bound_arms bound_legs bound_penis clothed digital_media_(artwork) dubnyangg ectopenis finger implied_female male male_focus malesub micro micro_male microphilia monster monster_boy penis pink_ribbon ribbon ribbon_bondage ribbon_on_penis sans sans_(undertale) skeleton smaller_male solo_focus solo_male submissive submissive_male tied_arms tied_legs tied_penis tied_up uke_sans undead undertale undertale_(series) video_game_character video_games white_background
1boy 2010s 2016 2d 2d_(artwork) animated_skeleton artist_name blue_blush blue_penis blush bondage bottom_sans bound_arms bound_legs bound_penis clothed digital_media_(artwork) dubnyangg ectopenis male male_focus male_only malesub monster penis pink_ribbon ribbon ribbon_bondage ribbon_in_mouth ribbon_on_penis ribbons sans sans_(undertale) skeleton solo solo_focus solo_male submissive submissive_male tied_penis tied_up uke_sans undead undertale undertale_(series) video_games white_background
1boy 2010s 2016 2d 2d_(artwork) animated_skeleton artist_name blue_blush blue_penis blush bondage bottom_sans bound_arms bound_legs bound_penis clothed digital_media_(artwork) dubnyangg ectopenis male male_focus male_only malesub monster penis pink_ribbon ribbon ribbon_bondage ribbon_in_mouth ribbon_on_penis ribbons sans sans_(undertale) skeleton solo solo_focus solo_male submissive submissive_male tied_penis tied_up uke_sans undead undertale undertale_(series) video_games white_background
2010s 2016 2boys anal animated_skeleton blue_blush blue_penis blush bottom_sans brother_and_brother brother_penetrating_brother brothers duo ectopenis english_text fontcest gay glowing glowing_eye grabbing_penis handjob handjob_while_penetrating heart incest intraspecies jacket male male/male male_only male_penetrated male_penetrating male_penetrating_male monochrome monster monster_boy orange_blush orange_eye orange_penis papyrus papyrus_(undertale) papysans partially_colored penetration penis sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton skullysins speech_bubble sweat text text_bubble top_papyrus uke_sans undead undertale undertale_(series) wearing_others_clothes yaoi
2010s 2016 2boys anal animated_skeleton blue_blush blue_penis blush bottom_sans brother_and_brother brother_penetrating_brother brothers duo ectopenis english_text fontcest gay glowing glowing_eye grabbing_penis handjob handjob_while_penetrating heart incest intraspecies jacket male male/male male_only male_penetrated male_penetrating male_penetrating_male monochrome monster monster_boy orange_blush orange_eye orange_penis papyrus papyrus_(undertale) papysans partially_colored penetration penis sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton skullysins speech_bubble sweat text text_bubble top_papyrus uke_sans undead undertale undertale_(series) wearing_others_clothes yaoi
1boy 2010s 2016 2d 2d_(artwork) animated_skeleton blue_blush blue_cum blue_hoodie blue_penis blush chubby chubby_male closed_eyes clothed clothed_male covering_face cum cumshot digital_media_(artwork) ectopenis ejaculation embarrassed embarrassing fully_clothed hooded_jacket hoodie jacket male male_masturbation male_only masturbation monster monster_boy penile_masturbation penis pink_slippers robonersmnc sans sans_(undertale) sitting skeleton slippers solo solo_male sweat tumblr undead undertale undertale_(series) video_game_character video_games
1boy 2010s 2016 2d 2d_(artwork) animated_skeleton blue_blush blue_cum blue_hoodie blue_penis blush chubby chubby_male closed_eyes clothed clothed_male covering_face cum cumshot digital_media_(artwork) ectopenis ejaculation embarrassed embarrassing fully_clothed hooded_jacket hoodie jacket male male_masturbation male_only masturbation monster monster_boy penile_masturbation penis pink_slippers robonersmnc sans sans_(undertale) sitting skeleton slippers solo solo_male sweat tumblr undead undertale undertale_(series) video_game_character video_games
1boy 2010s 2016 2d 2d_(artwork) against_the_wall against_wall animated_skeleton blue_hoodie blue_jacket blue_penis blush chubby chubby_male closed_eyes clothed clothing digital_media_(artwork) ectopenis genitals grabbing_own_penis hooded_jacket hoodie jacket male male_masturbation male_only masturbation monster monster_boy penile penile_masturbation penis penis_out pink_slippers robonersmnc sans sans_(undertale) simple_background skeleton slippers solo_male standing sweat tumblr undead undertale undertale_(series) video_game_character video_games
1boy 2010s 2016 2d 2d_(artwork) against_the_wall against_wall animated_skeleton blue_hoodie blue_jacket blue_penis blush chubby chubby_male closed_eyes clothed clothing digital_media_(artwork) ectopenis genitals grabbing_own_penis hooded_jacket hoodie jacket male male_masturbation male_only masturbation monster monster_boy penile penile_masturbation penis penis_out pink_slippers robonersmnc sans sans_(undertale) simple_background skeleton slippers solo_male standing sweat tumblr undead undertale undertale_(series) video_game_character video_games
8boys anal animated_skeleton big_belly blue_body blue_eyes blue_heart blue_hoodie blue_jacket blue_penis bottom_sans bukkake chubby chubby_male clothed cum cum_in_ass cum_in_mouth cum_on_body cum_on_clothes cum_on_face cum_on_upper_body double_handjob ectobody ectopenis erection fellatio gangbang glowing glowing_eyes grabbing_penis grey_background heart heart_eyes hooded_jacket hoodie jacket ksuriuri male male/male male_only monster multiple_boys multiple_males multiple_penises overweight overweight_male pants_around_one_leg penis sans sans_(undertale) shortsnas simple_background skeleton solo_focus surrounded_by_penises uke_sans undead undertale undertale_(series) unseen_male unseen_male_face
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2020s 2022 2boys 2d 2d_(artwork) abosinsin anal anal_penetration anal_sex animated_skeleton arms_grab bad_id bad_twitter_id big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller black_legwear blue_hoodie blue_penis blush bodily_fluids bottom_sans bouncing_penis brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed cussing dialogue digital_media_(artwork) dirty_talk duo ectopenis english_text erect_while_penetrated fluids fontcest from_behind_position fully_clothed gloves grabbing_from_behind head_out_of_frame holding_arms hoodie inactive_account incest intraspecies kneeling larger_dom larger_male larger_penetrating larger_penetrating_smaller leaking_cum legwear male male/male male_only male_out_of_frame male_penetrated male_penetrating male_penetrating_male maledom moan moaning monster monster_boy motion_lines onomatopoeia papyrus papyrus_(undertale) papysans penetration penetration_from_behind penetration_through_clothes penis penis_through_clothing pounding prison_guard_position profanity red_gloves sans sans_(undertale) seme_papyrus sex sex_from_behind sex_through_clothes sex_through_clothing sibling_incest siblings size_difference skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smooth_penis swearing sweat text text_bubble thought_bubble thrusting top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background yaoi
2020s 2022 2boys 2d 2d_(artwork) abosinsin anal anal_penetration anal_sex animated_skeleton arms_grab bad_id bad_twitter_id big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller black_legwear blue_hoodie blue_penis blush bodily_fluids bottom_sans bouncing_penis brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed cussing dialogue digital_media_(artwork) dirty_talk duo ectopenis english_text erect_while_penetrated fluids fontcest from_behind_position fully_clothed gloves grabbing_from_behind head_out_of_frame holding_arms hoodie inactive_account incest intraspecies kneeling larger_dom larger_male larger_penetrating larger_penetrating_smaller leaking_cum legwear male male/male male_only male_out_of_frame male_penetrated male_penetrating male_penetrating_male maledom moan moaning monster monster_boy motion_lines onomatopoeia papyrus papyrus_(undertale) papysans penetration penetration_from_behind penetration_through_clothes penis penis_through_clothing pounding prison_guard_position profanity red_gloves sans sans_(undertale) seme_papyrus sex sex_from_behind sex_through_clothes sex_through_clothing sibling_incest siblings size_difference skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smooth_penis swearing sweat text text_bubble thought_bubble thrusting top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background yaoi
2boys 2d 2d_(artwork) animated_skeleton big_dom_small_sub bigger_dom bigger_dom_smaller_sub blue_blush blue_penis blue_tongue blush bonetrouble bottom_sans brother brother/brother brother_and_brother brothers clothed_male cropped crying drawn drooling edited erection fontcest genitals handjob incest intraspecies kneel male male/male male_only monster monster_boy orange_blush pants_only papyrus papyrus_(undertale) papysans penis penis_grab saliva sans sans_(undertale) seme_papyrus shirtless sibling_incest siblings sitting skeleton small_sub small_sub_big_dom smaller_sub smaller_sub_bigger_dom smaller_submissive tears top_papyrus topless topless_male traditional_media traditional_media_(artwork) uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
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2010s 2016 2boys 2d 2d_(artwork) against_wall anal animated_skeleton arms_around_another arms_around_another's_neck arms_around_neck artist_name backwards_hat big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_female bigger_male bigger_penetrating_smaller blue_blush blue_hoodie blue_jacket blue_penis blue_saliva bluetrashsins blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers cap carrying carrying_partner carrying_position digital_media_(artwork) drooling duo ectopenis fontcest gay genitals glowing glowing_eye glowing_penis hands_around_neck hoodie incest intraspecies jacket larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy orange_blush orange_penis orange_saliva papyrus papyrus_(undertale) papysans penetration red_cap sans sans_(undertale) seme_papyrus sex shirt_only sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom stand_and_carry_position suspended_congress tears top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games wall_sex yaoi
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2010s 2016 2boys anal animated_skeleton blue_blush blue_penis blue_tongue blush bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers duo ectopenis ectotongue fontcest gay gloves incest intraspecies male male/male male_only male_penetrated male_penetrating male_penetrating_male monochrome monster monster_boy orange_blush orange_penis orange_tongue papyrus papyrus_(undertale) papysans partially_colored penetration penis sans sans_(undertale) seme_papyrus sex shirt_only sibling_incest siblings skeleton skullysins table_sex thrusting tongue tongue_out top_papyrus uke_sans undead undertale undertale_(series) yaoi
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1boy 2010s 2015 2d 2d_(artwork) ahegao animated_skeleton arms_behind_back blue_blush blue_penis blue_tongue blush bodily_fluids bound_arms chubby chubby_male clothed clothing cum digital_media_(artwork) ectopenis erection fluids genitals hands_behind_back heart heart_eyes male male_ahegao male_only monochrome monster orgasm_face overstimulation penis penis_out pleasure_face sans sans_(undertale) sitting skeleton solo_male spread_legs suckmytrombone sweat sweater text tied_arms tied_up tongue tongue_out undead undertale undertale_(series) video_games white_background
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1:1 1:1_aspect_ratio 2010s 2018 2boys anal animated_skeleton artist_name artist_signature ass big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_penetrating bigger_penetrating_smaller blue_blush blue_body blue_glans blue_penis blue_tongue blush bottom_sans bottomless bottomless_male bound bound_wrists brother brother/brother brother_and_brother brother_penetrating_brother brothers choker clothed collar doggy_position duo ectobody ectopenis ectotongue fontcest from_behind from_behind_position gay handcuffed handcuffs incest larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy nsfwgarbagedump orange_blush orange_body papyrus papyrus_(undertale) papysans partially_clothed penetration penetration_from_behind penis pixiv_id_36285069 restrained restraints sans sans_(undertale) seme_papyrus sex sex_from_behind sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom socks socks_on tongue tongue_out top_papyrus uke_sans undead undertale undertale_(series) white_background yaoi
1:1 1:1_aspect_ratio 2010s 2018 2boys anal animated_skeleton artist_name artist_signature ass big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_penetrating bigger_penetrating_smaller blue_blush blue_body blue_glans blue_penis blue_tongue blush bottom_sans bottomless bottomless_male bound bound_wrists brother brother/brother brother_and_brother brother_penetrating_brother brothers choker clothed collar doggy_position duo ectobody ectopenis ectotongue fontcest from_behind from_behind_position gay handcuffed handcuffs incest larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy nsfwgarbagedump orange_blush orange_body papyrus papyrus_(undertale) papysans partially_clothed penetration penetration_from_behind penis pixiv_id_36285069 restrained restraints sans sans_(undertale) seme_papyrus sex sex_from_behind sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom socks socks_on tongue tongue_out top_papyrus uke_sans undead undertale undertale_(series) white_background yaoi
1boy 2021 2d 2d_(artwork) animated_skeleton biting_clothes biting_shirt black_censor_bar blue_background blue_blush blue_hoodie blue_jacket blue_penis blush blush_lines bone bottom_sans censor_bar censored_penis clothed cum cyan_background digital_media_(artwork) ectopenis ectoplasm ejaculating_on_self ejaculation english_text erection fingering fingering_self fontcest genitals handjob hooded_jacket hoodie humanoid jacket jerking_off male male_only masturbation moaning moaning_in_pleasure monster monster_boy object_insertion papysans penile_masturbation penis sans sans_(undertale) simple_background skeleton socks solid_color_background solo submissive text uke_sans undertale undertale_(series) video_game_character video_games xxoxxkm_(pixiv_id_3871107)
1boy 2021 2d 2d_(artwork) animated_skeleton biting_clothes biting_shirt black_censor_bar blue_background blue_blush blue_hoodie blue_jacket blue_penis blush blush_lines bone bottom_sans censor_bar censored_penis clothed cum cyan_background digital_media_(artwork) ectopenis ectoplasm ejaculating_on_self ejaculation english_text erection fingering fingering_self fontcest genitals handjob hooded_jacket hoodie humanoid jacket jerking_off male male_only masturbation moaning moaning_in_pleasure monster monster_boy object_insertion papysans penile_masturbation penis sans sans_(undertale) simple_background skeleton socks solid_color_background solo submissive text uke_sans undertale undertale_(series) video_game_character video_games xxoxxkm_(pixiv_id_3871107)
1:1 1:1_aspect_ratio 1boy 2021 2d 2d_(artwork) animated_skeleton blue_blush blue_penis blush bottom_sans censor_bar censored_penis digital_media_(artwork) ectopenis english_text fellatio hooded_jacket humanoid jacket male male_only monster monster_boy pants_down pants_pulled_down pink_background pink_tentacles restrained sans sans_(undertale) simple_background skeleton solid_color_background solo solo_male soul_sex submissive sweat tears tentacle tentacle_around_leg tentacle_in_mouth tentacle_job tentacle_penetration tentaclejob tentacles_on_male tentacles_under_clothes text uke_sans undertale undertale_(series) undressing_another video_game_character video_games xxoxxkm_(pixiv_id_3871107)
1:1 1:1_aspect_ratio 1boy 2021 2d 2d_(artwork) animated_skeleton blue_blush blue_penis blush bottom_sans censor_bar censored_penis digital_media_(artwork) ectopenis english_text fellatio hooded_jacket humanoid jacket male male_only monster monster_boy pants_down pants_pulled_down pink_background pink_tentacles restrained sans sans_(undertale) simple_background skeleton solid_color_background solo solo_male soul_sex submissive sweat tears tentacle tentacle_around_leg tentacle_in_mouth tentacle_job tentacle_penetration tentaclejob tentacles_on_male tentacles_under_clothes text uke_sans undertale undertale_(series) undressing_another video_game_character video_games xxoxxkm_(pixiv_id_3871107)
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2010s 2018 animated_skeleton artist_name blue_blush blue_hoodie blue_jacket blue_penis blush bottom_sans bottomless censored_penis closed_eyes clothed crying crying_with_eyes_closed cum cum_inside cum_on_self cum_while_penetrated cumshot dominant_pov drooling ectopenis ectoplasm ejaculation hooded_jacket hoodie jacket japanese_text male male_pov monster orgasm penetrating_pov penetration penetrator_pov penis pov sans sans_(undertale) sex shing-kanakugi skeleton socks socks_on tears text uke_sans undead undertale undertale_(series) unseen_male unseen_male_face
2010s 2018 animated_skeleton artist_name blue_blush blue_hoodie blue_jacket blue_penis blush bottom_sans bottomless bouncing_penis censor_bar censored_penis clothed crying dominant_pov drooling ectopenis ectoplasm grabbing_sheets gripping_sheets hooded_jacket hoodie jacket japanese_text looking_at_viewer male male_pov monster penetrating_pov penetration penetrator_pov penis pov sans sans_(undertale) sex sheet_grab shing-kanakugi skeleton socks socks_on tears text uke_sans undead undertale undertale_(series) unseen_male unseen_male_face
2010s 2018 animated_skeleton artist_name blue_blush blue_hoodie blue_jacket blue_penis blush bottom_sans bottomless bouncing_penis censor_bar censored_penis clothed crying dominant_pov drooling ectopenis ectoplasm grabbing_sheets gripping_sheets hooded_jacket hoodie jacket japanese_text looking_at_viewer male male_pov monster penetrating_pov penetration penetrator_pov penis pov sans sans_(undertale) sex sheet_grab shing-kanakugi skeleton socks socks_on tears text uke_sans undead undertale undertale_(series) unseen_male unseen_male_face