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2d 2d_(artwork) animated_skeleton blue_blush blue_hoodie blue_jacket blush bottom_sans breasts brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing digital_media_(artwork) duo ectobreasts ectopenis ectoplasm fontcest genitals hooded_jacket hoodie incest jacket male male_pov medium_breasts misake-san moaning monster orange_penis papyrus papyrus_(undertale) papysans penetrating_pov penetration penetrator_pov penis sans sans_(undertale) seme_papyrus sex skeleton solo_focus speech_bubble top_papyrus topwear uke_sans undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games
2d 2d_(artwork) animated_skeleton blue_blush blue_hoodie blue_jacket blush bottom_sans breasts brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing digital_media_(artwork) duo ectobreasts ectopenis ectoplasm fontcest genitals hooded_jacket hoodie incest jacket male male_pov medium_breasts misake-san moaning monster orange_penis papyrus papyrus_(undertale) papysans penetrating_pov penetration penetrator_pov penis sans sans_(undertale) seme_papyrus sex skeleton solo_focus speech_bubble top_papyrus topwear uke_sans undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games
2021 2boys 2d anal animated_skeleton bed bedroom big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers completely_nude completely_nude_male digital_media duo ectopenis ectoplasm fluids fontcest from_front_position genitals goma_dango_555 incest intraspecies larger_male larger_penetrating larger_penetrating_smaller lying_on_back lying_on_bed male male_only male_penetrating missionary_position monster monster_boy nude nude_male on_back on_bed orange_blush orange_penis papyrus_(undertale) papysans penetration penetration_from_front penis pillow sans_(undertale) seme_papyrus sex sex_from_front sex_on_bed sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom sweat tears toony top_papyrus trembling uke_sans undead undertale undertale_(series) video_game_character video_games visible_breath yaoi
2021 2boys 2d anal animated_skeleton bed bedroom big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers completely_nude completely_nude_male digital_media duo ectopenis ectoplasm fluids fontcest from_front_position genitals goma_dango_555 incest intraspecies larger_male larger_penetrating larger_penetrating_smaller lying_on_back lying_on_bed male male_only male_penetrating missionary_position monster monster_boy nude nude_male on_back on_bed orange_blush orange_penis papyrus_(undertale) papysans penetration penetration_from_front penis pillow sans_(undertale) seme_papyrus sex sex_from_front sex_on_bed sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom sweat tears toony top_papyrus trembling uke_sans undead undertale undertale_(series) video_game_character video_games visible_breath yaoi
2022 2boys 2d anal animated_skeleton bed bedroom big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clock clothed curtains dark_room digital_media duo ectopenis ectoplasm fontcest from_front_position genitals goma_dango_555 incest indoors intraspecies larger_male larger_penetrating larger_penetrating_smaller male male_only male_penetrating mastery_position monster monster_boy night on_bed orange_blush orange_penis papyrus_(undertale) papysans partially_clothed penetration penetration_from_front penis sans_(undertale) seme_papyrus sex sex_from_front sex_on_bed sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom socks socks_on toony top_papyrus uke_sans undead undertale undertale_(series) video_games wall_clock window yaoi
2022 2boys 2d anal animated_skeleton bed bedroom big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clock clothed curtains dark_room digital_media duo ectopenis ectoplasm fontcest from_front_position genitals goma_dango_555 incest indoors intraspecies larger_male larger_penetrating larger_penetrating_smaller male male_only male_penetrating mastery_position monster monster_boy night on_bed orange_blush orange_penis papyrus_(undertale) papysans partially_clothed penetration penetration_from_front penis sans_(undertale) seme_papyrus sex sex_from_front sex_on_bed sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom socks socks_on toony top_papyrus uke_sans undead undertale undertale_(series) video_games wall_clock window yaoi
2021 2boys 2d against_the_wall against_wall alley anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_penetrating bigger_penetrating_smaller biting_clothes biting_shirt blue_blush blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing digital_media duo ectopenis fontcest from_front_position goma_dango_555 hooded_jacket hoodie incest intraspecies jacket kabedon larger_penetrating larger_penetrating_smaller male male_only male_penetrating monster monster_boy orange_blush pants_around_one_leg pants_down papyrus_(undertale) papysans partially_clothed penetration penetration_from_front penis pinned pinned_to_wall sans_(undertale) seme_papyrus sex sex_from_front shoes sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom stealth_sex toony top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games wall wall_(structure) yaoi
2021 2boys 2d against_the_wall against_wall alley anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_penetrating bigger_penetrating_smaller biting_clothes biting_shirt blue_blush blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing digital_media duo ectopenis fontcest from_front_position goma_dango_555 hooded_jacket hoodie incest intraspecies jacket kabedon larger_penetrating larger_penetrating_smaller male male_only male_penetrating monster monster_boy orange_blush pants_around_one_leg pants_down papyrus_(undertale) papysans partially_clothed penetration penetration_from_front penis pinned pinned_to_wall sans_(undertale) seme_papyrus sex sex_from_front shoes sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom stealth_sex toony top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games wall wall_(structure) yaoi
2022 2boys 2d anal animated_skeleton bedroom big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed digital_media duo fontcest from_front_position goma_dango_555 incest indoors intraspecies kissing kneeling larger_male larger_penetrating larger_penetrating_smaller male male_only male_penetrating monster monster_boy on_bed orange_blush papyrus_(undertale) papysans partially_clothed penetration sans_(undertale) seme_papyrus sex sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom socks socks_on toony top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
2022 2boys 2d anal animated_skeleton bedroom big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed digital_media duo fontcest from_front_position goma_dango_555 incest indoors intraspecies kissing kneeling larger_male larger_penetrating larger_penetrating_smaller male male_only male_penetrating monster monster_boy on_bed orange_blush papyrus_(undertale) papysans partially_clothed penetration sans_(undertale) seme_papyrus sex sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom socks socks_on toony top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
2022 2boys 2d anal animated_skeleton bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush bottom_on_top bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed digital_media_(artwork) duo ectopenis ectotongue fontcest from_front_position goma_dango_555 green_socks incest intraspecies kneeling larger_male larger_penetrating larger_penetrating_smaller making_out male male_only male_penetrating monster monster_boy orange_blush orange_socks orange_tongue papyrus_(undertale) papysans partially_clothed penetration penetration_from_front penis power_bottom saliva saliva_trail sans_(undertale) seme_papyrus sex sex_from_front sibling_incest siblings simple_background skeleton smaller_penetrated socks socks_on solid_color_background sweat tongue tongue_out toony top_papyrus topwear uke_sans undead undertale undertale_(series) video_game_character video_games visible_breath yaoi
2022 2boys 2d anal animated_skeleton bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush bottom_on_top bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed digital_media_(artwork) duo ectopenis ectotongue fontcest from_front_position goma_dango_555 green_socks incest intraspecies kneeling larger_male larger_penetrating larger_penetrating_smaller making_out male male_only male_penetrating monster monster_boy orange_blush orange_socks orange_tongue papyrus_(undertale) papysans partially_clothed penetration penetration_from_front penis power_bottom saliva saliva_trail sans_(undertale) seme_papyrus sex sex_from_front sibling_incest siblings simple_background skeleton smaller_penetrated socks socks_on solid_color_background sweat tongue tongue_out toony top_papyrus topwear uke_sans undead undertale undertale_(series) video_game_character video_games visible_breath yaoi
2021 2boys 2d anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothes_lift crying digital_media duo ectopenis ectoplasm ectotongue fontcest from_front_position goma_dango_555 incest intraspecies larger_penetrating larger_penetrating_smaller making_out male male_only male_penetrating mastery_position monster monster_boy orange_blush orange_penis orange_tongue papyrus_(undertale) papysans partially_clothed partially_colored penetration penetration_from_front penis riding riding_penis sans_(undertale) seme_papyrus sex sex_from_front shirt_lift sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom socks socks_on sweat tears tongue tongue_out toony top_papyrus uke_sans undead undertale undertale_(series) video_games yaoi
2021 2boys 2d anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothes_lift crying digital_media duo ectopenis ectoplasm ectotongue fontcest from_front_position goma_dango_555 incest intraspecies larger_penetrating larger_penetrating_smaller making_out male male_only male_penetrating mastery_position monster monster_boy orange_blush orange_penis orange_tongue papyrus_(undertale) papysans partially_clothed partially_colored penetration penetration_from_front penis riding riding_penis sans_(undertale) seme_papyrus sex sex_from_front shirt_lift sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom socks socks_on sweat tears tongue tongue_out toony top_papyrus uke_sans undead undertale undertale_(series) video_games yaoi
2021 2boys 2d anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush bottom_sans bottomwear brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothed_sex clothing digital_media duo ectopenis erection fontcest goma_dango_555 holding_hands incest interlocked_fingers intertwined_fingers intraspecies japanese_text kneeling larger_penetrating larger_penetrating_smaller making_out male male_only male_penetrating monster monster_boy off_shoulder orange_blush pants pants_around_one_leg papyrus_(undertale) papysans partially_clothed penetration penis sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom socks socks_on text toony top_papyrus topwear uke_sans undead undertale undertale_(series) video_game_character video_games white_background x-ray yaoi
2021 2boys 2d anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush bottom_sans bottomwear brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothed_sex clothing digital_media duo ectopenis erection fontcest goma_dango_555 holding_hands incest interlocked_fingers intertwined_fingers intraspecies japanese_text kneeling larger_penetrating larger_penetrating_smaller making_out male male_only male_penetrating monster monster_boy off_shoulder orange_blush pants pants_around_one_leg papyrus_(undertale) papysans partially_clothed penetration penis sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom socks socks_on text toony top_papyrus topwear uke_sans undead undertale undertale_(series) video_game_character video_games white_background x-ray yaoi
2021 2boys 2d anal animated_skeleton bigger_penetrating bigger_penetrating_smaller black_background blue_blush blue_tongue blush bottom_on_top bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers censored censored_penis clothed completely_nude crying crying_with_eyes_open digital_media duo ectopenis ectoplasm ectotongue fontcest goma_dango_555 incest intraspecies larger_penetrating larger_penetrating_smaller male male_only male_penetrating male_pov monster monster_boy nude orange_blush orange_penis papyrus_(undertale) papysans partially_clothed penetrating_pov penetration penetrator_pov penis pov power_bottom pussy riding riding_penis sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton smaller_penetrated socks solo_focus tears tongue tongue_out toony top_papyrus trembling uke_sans undead undertale undertale_(series) unseen_male_face video_games visible_breath white_censor_bar yaoi
2021 2boys 2d anal animated_skeleton bigger_penetrating bigger_penetrating_smaller black_background blue_blush blue_tongue blush bottom_on_top bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers censored censored_penis clothed completely_nude crying crying_with_eyes_open digital_media duo ectopenis ectoplasm ectotongue fontcest goma_dango_555 incest intraspecies larger_penetrating larger_penetrating_smaller male male_only male_penetrating male_pov monster monster_boy nude orange_blush orange_penis papyrus_(undertale) papysans partially_clothed penetrating_pov penetration penetrator_pov penis pov power_bottom pussy riding riding_penis sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton smaller_penetrated socks solo_focus tears tongue tongue_out toony top_papyrus trembling uke_sans undead undertale undertale_(series) unseen_male_face video_games visible_breath white_censor_bar 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 blue_blush blue_eyes blue_penis blue_tongue blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing crying crying_with_eyes_open dominant dominant_male duo ectopenis ectotongue edit edited fontcest from_behind_position gay_sex gif gloves glowing glowing_genitalia glowing_penis grabbing grabbing_clothing grabbing_from_behind heart-shaped_pupils heart_eyes incest larger_male male male/male male_focus male_only maledom malesub monster open_mouth orange_penis papyrus papyrus_(undertale) papysans penetration penetration_from_behind penis pleasure_face realdemdemdmensfw sans sans_(undertale) seme_papyrus sex sex_from_behind simple_background skeleton slideshow small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male tears tears_of_pleasure third-party_edit tongue tongue_out top_papyrus tumblr uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background 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 blue_blush blue_eyes blue_penis blue_tongue blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing crying crying_with_eyes_open dominant dominant_male duo ectopenis ectotongue edit edited fontcest from_behind_position gay_sex gif gloves glowing glowing_genitalia glowing_penis grabbing grabbing_clothing grabbing_from_behind heart-shaped_pupils heart_eyes incest larger_male male male/male male_focus male_only maledom malesub monster open_mouth orange_penis papyrus papyrus_(undertale) papysans penetration penetration_from_behind penis pleasure_face realdemdemdmensfw sans sans_(undertale) seme_papyrus sex sex_from_behind simple_background skeleton slideshow small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male tears tears_of_pleasure third-party_edit tongue tongue_out top_papyrus tumblr uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background 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 blue_blush blue_eyes blue_penis blue_tongue blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing crying crying_with_eyes_open dominant dominant_male duo ectopenis ectotongue edit edited fontcest from_behind_position gay_sex gloves glowing glowing_genitalia glowing_penis grabbing grabbing_clothing grabbing_from_behind heart-shaped_pupils heart_eyes incest larger_male long_image male male/male male_focus male_only maledom malesub monster open_mouth orange_penis papyrus papyrus_(undertale) papysans penetration penetration_from_behind penis pleasure_face realdemdemdmensfw sans sans_(undertale) seme_papyrus sex sex_from_behind simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male tears tears_of_pleasure third-party_edit tongue tongue_out top_papyrus tumblr uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background 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 blue_blush blue_eyes blue_penis blue_tongue blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing crying crying_with_eyes_open dominant dominant_male duo ectopenis ectotongue edit edited fontcest from_behind_position gay_sex gloves glowing glowing_genitalia glowing_penis grabbing grabbing_clothing grabbing_from_behind heart-shaped_pupils heart_eyes incest larger_male long_image male male/male male_focus male_only maledom malesub monster open_mouth orange_penis papyrus papyrus_(undertale) papysans penetration penetration_from_behind penis pleasure_face realdemdemdmensfw sans sans_(undertale) seme_papyrus sex sex_from_behind simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male tears tears_of_pleasure third-party_edit tongue tongue_out top_papyrus tumblr uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background yaoi
2010s 2018 2boys 2d 2d_(artwork) anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_penis bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing dominant dominant_male duo ectopenis fontcest from_behind_position gay_sex glowing glowing_genitalia glowing_penis incest larger_male male male/male male_focus male_only maledom malesub monster orange_penis papyrus papyrus_(undertale) papysans penetration penetration_from_behind penis realdemdemdmensfw sans sans_(undertale) seme_papyrus sex sex_from_behind simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male top_papyrus tumblr uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background yaoi
2010s 2018 2boys 2d 2d_(artwork) anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_penis bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing dominant dominant_male duo ectopenis fontcest from_behind_position gay_sex glowing glowing_genitalia glowing_penis incest larger_male male male/male male_focus male_only maledom malesub monster orange_penis papyrus papyrus_(undertale) papysans penetration penetration_from_behind penis realdemdemdmensfw sans sans_(undertale) seme_papyrus sex sex_from_behind simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male top_papyrus tumblr uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background yaoi
2018 2boys 2d animated_skeleton artist_name ass bigger_male blue_blush blue_penis blush bottom_sans brother/brother brothers closed_eyes dated duo ectopenis fontcest genitals glowing glowing_genitalia glowing_penis hand_on_another's_head hand_on_head humanoid incest intraspecies kissing larger_male male male/male male_only monster monster_boy nude nude_male orange_blush orange_penis papyrus_(undertale) papysans partially_colored penis realdemdemdmensfw sans_(undertale) seme_papyrus sibling_incest siblings skeleton smaller_male top_papyrus undead undertale undertale_(series) video_game_character video_games yaoi
2018 2boys 2d animated_skeleton artist_name ass bigger_male blue_blush blue_penis blush bottom_sans brother/brother brothers closed_eyes dated duo ectopenis fontcest genitals glowing glowing_genitalia glowing_penis hand_on_another's_head hand_on_head humanoid incest intraspecies kissing larger_male male male/male male_only monster monster_boy nude nude_male orange_blush orange_penis papyrus_(undertale) papysans partially_colored penis realdemdemdmensfw sans_(undertale) seme_papyrus sibling_incest siblings skeleton smaller_male top_papyrus undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys after_fellatio after_oral angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing cum_in_mouth dominant dominant_male duo ectopenis edit edited english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket kneel larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male sympharin symphysins talking_to_another tears text third-party_edit top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
2010s 2018 2boys after_fellatio after_oral angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing cum_in_mouth dominant dominant_male duo ectopenis edit edited english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket kneel larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male sympharin symphysins talking_to_another tears text third-party_edit top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
2010s 2018 2boys after_fellatio after_oral angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing cum_in_mouth dominant dominant_male duo ectopenis edit edited english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket kneel larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male sympharin symphysins talking_to_another tears text third-party_edit top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
2010s 2018 2boys after_fellatio after_oral angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing cum_in_mouth dominant dominant_male duo ectopenis edit edited english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket kneel larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male sympharin symphysins talking_to_another tears text third-party_edit top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
1:1 1:1_aspect_ratio 2010s 2018 2boys after_fellatio after_oral animated_skeleton black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing cum_in_mouth duo english_text fontcest hoodie incest intraspecies jacket kneeling male male/male male_only maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch solo_focus submissive submissive_male sympharin symphysins talking_to_another text top_papyrus uke_sans undead undertale undertale_(series) unseen_character video_games white_background yaoi
1:1 1:1_aspect_ratio 2010s 2018 2boys after_fellatio after_oral animated_skeleton black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing cum_in_mouth duo english_text fontcest hoodie incest intraspecies jacket kneeling male male/male male_only maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch solo_focus submissive submissive_male sympharin symphysins talking_to_another text top_papyrus uke_sans undead undertale undertale_(series) unseen_character video_games white_background yaoi
1:1 1:1_aspect_ratio 2010s 2018 2boys angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing dominant dominant_male duo ectopenis english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom submissive submissive_male sympharin symphysins talking_to_another tears text top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
1:1 1:1_aspect_ratio 2010s 2018 2boys angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing dominant dominant_male duo ectopenis english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom submissive submissive_male sympharin symphysins talking_to_another tears text top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
2023 2boys 2d all_fours animated_skeleton bad_id bad_twitter_id big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_background blanket blue_blush blush blush_lines bottom_sans boxers_(clothing) boxers_around_one_leg brother/brother brother_penetrating_brother brothers clothed clothing dark_background digital_media duo fontcest from_behind_position hat headwear hooded_jacket hoodie humanoid implied_bottomless implied_penetration implied_sex inactive_account incest interlocked_fingers intertwined_fingers intraspecies jacket larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrating male_penetrating_male monster monster_boy nightcap on_bed one_eye_closed orange_blush pajamas papyrus_(undertale) papysans polka_dot_clothing polka_dot_hat polka_dot_pajamas sans_(undertale) seme_papyrus sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom striped_bottomwear striped_boxers text top_papyrus topwear toubigaizi undead undertale undertale_(series) video_game_character video_games yaoi
2023 2boys 2d all_fours animated_skeleton bad_id bad_twitter_id big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_background blanket blue_blush blush blush_lines bottom_sans boxers_(clothing) boxers_around_one_leg brother/brother brother_penetrating_brother brothers clothed clothing dark_background digital_media duo fontcest from_behind_position hat headwear hooded_jacket hoodie humanoid implied_bottomless implied_penetration implied_sex inactive_account incest interlocked_fingers intertwined_fingers intraspecies jacket larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrating male_penetrating_male monster monster_boy nightcap on_bed one_eye_closed orange_blush pajamas papyrus_(undertale) papysans polka_dot_clothing polka_dot_hat polka_dot_pajamas sans_(undertale) seme_papyrus sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom striped_bottomwear striped_boxers text top_papyrus topwear toubigaizi undead undertale undertale_(series) video_game_character video_games yaoi
2020s 2023 2boys 2d 2d_(artwork) anger_vein animated_skeleton bad_id bad_twitter_id big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white blush blush_lines bottom_sans brother brother/brother brother_and_brother brothers cape clothed clothing digital_media_(artwork) duo fontcest grabbing_hand hand_grab hooded_jacket hoodie imminent_sex inactive_account incest jacket kissing larger_male male male/male male_only monochrome monster monster_boy multiple_views pants_around_legs papyrus papyrus_(undertale) papysans pinned_down sans sans_(undertale) seme_papyrus simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom text top_papyrus toubigaizi twitter uke_sans undead undertale undertale_(series) valentine's_day video_game_character video_games white_background yaoi
2020s 2023 2boys 2d 2d_(artwork) anger_vein animated_skeleton bad_id bad_twitter_id big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white blush blush_lines bottom_sans brother brother/brother brother_and_brother brothers cape clothed clothing digital_media_(artwork) duo fontcest grabbing_hand hand_grab hooded_jacket hoodie imminent_sex inactive_account incest jacket kissing larger_male male male/male male_only monochrome monster monster_boy multiple_views pants_around_legs papyrus papyrus_(undertale) papysans pinned_down sans sans_(undertale) seme_papyrus simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom text top_papyrus toubigaizi twitter uke_sans undead undertale undertale_(series) valentine's_day video_game_character video_games white_background yaoi
2020s 2022 2boys 2d 2d_(artwork) animated_skeleton arms_around_another arms_around_another's_neck artist_name artist_watermark biting biting_shoulder bottom_sans bottomwear brother brother/brother brother_and_brother brothers clothed clothing digital_media_(artwork) drooling duo ectotongue empath__life fontcest grey_background hand_in_pants hand_under_clothes hands_on_another's_chest hands_on_chest incest kissing making_out male male/male male_only monochrome monster monster_boy pants papyrus papyrus_(undertale) papysans partially_clothed partially_nude saliva saliva_on_tongue saliva_trail sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings simple_background skeleton taking_off_clothes tel_a_friend tongue top_papyrus topless topless_male twitter uke_sans undead undertale undertale_(series) undressing video_game_character video_games watermark yaoi
2020s 2022 2boys 2d 2d_(artwork) animated_skeleton arms_around_another arms_around_another's_neck artist_name artist_watermark biting biting_shoulder bottom_sans bottomwear brother brother/brother brother_and_brother brothers clothed clothing digital_media_(artwork) drooling duo ectotongue empath__life fontcest grey_background hand_in_pants hand_under_clothes hands_on_another's_chest hands_on_chest incest kissing making_out male male/male male_only monochrome monster monster_boy pants papyrus papyrus_(undertale) papysans partially_clothed partially_nude saliva saliva_on_tongue saliva_trail sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings simple_background skeleton taking_off_clothes tel_a_friend tongue top_papyrus topless topless_male twitter uke_sans undead undertale undertale_(series) undressing video_game_character video_games watermark yaoi
... 2020s 2022 2boys 2d 2d_(artwork) animated_skeleton artist_name artist_watermark biting biting_shoulder bottom_sans bottomwear brother brother/brother brother_and_brother brothers cape clothed clothing dialog dialogue digital_media_(artwork) duo ectotongue empath__life english_text fontcest gloves grey_background hands_around_neck hands_on_another's_shoulders hands_on_shoulders hooded_jacket hoodie incest jacket kissing making_out male male/male male_only monochrome monster monster_boy pants papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male partially_nude saliva saliva_on_tongue saliva_trail sans sans_(undertale) scarf seme_papyrus sequence sequential sibling_incest siblings simple_background skeleton taking_off_clothes tel_a_friend text tongue top_papyrus topless topless_male twitter uke_sans undead undertale undertale_(series) undressing undressing_another undressing_partner video_game_character video_games watermark yaoi
... 2020s 2022 2boys 2d 2d_(artwork) animated_skeleton artist_name artist_watermark biting biting_shoulder bottom_sans bottomwear brother brother/brother brother_and_brother brothers cape clothed clothing dialog dialogue digital_media_(artwork) duo ectotongue empath__life english_text fontcest gloves grey_background hands_around_neck hands_on_another's_shoulders hands_on_shoulders hooded_jacket hoodie incest jacket kissing making_out male male/male male_only monochrome monster monster_boy pants papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male partially_nude saliva saliva_on_tongue saliva_trail sans sans_(undertale) scarf seme_papyrus sequence sequential sibling_incest siblings simple_background skeleton taking_off_clothes tel_a_friend text tongue top_papyrus topless topless_male twitter uke_sans undead undertale undertale_(series) undressing undressing_another undressing_partner video_game_character video_games watermark yaoi
2018 2boys 2d after_penetration after_sex anal animated_skeleton ass blue_blush blue_penis blush blush_lines bodily_fluids bottom_sans bottomless bottomless_male brother/brother brothers clothed clothing completely_nude completely_nude_male cuddling cum cum_inside cum_leaking digital_media duo ectopenis ectoplasm erection fluids fontcest genital_fluids genitals hugging humanoid incest intraspecies male male/male male_focus male_only mianpigui_(wqw1201501125) monster monster_boy nude nude_male orange_blush orange_penis papyrus_(undertale) papysans partially_clothed partially_clothed_male penis pillow pussy sans_(undertale) seme_papyrus semen sibling_incest siblings skeleton sweat top_papyrus undead undertale undertale_(series) video_game_character video_games yaoi
2018 2boys 2d after_penetration after_sex anal animated_skeleton ass blue_blush blue_penis blush blush_lines bodily_fluids bottom_sans bottomless bottomless_male brother/brother brothers clothed clothing completely_nude completely_nude_male cuddling cum cum_inside cum_leaking digital_media duo ectopenis ectoplasm erection fluids fontcest genital_fluids genitals hugging humanoid incest intraspecies male male/male male_focus male_only mianpigui_(wqw1201501125) monster monster_boy nude nude_male orange_blush orange_penis papyrus_(undertale) papysans partially_clothed partially_clothed_male penis pillow pussy sans_(undertale) seme_papyrus semen sibling_incest siblings skeleton sweat top_papyrus undead undertale undertale_(series) video_game_character video_games yaoi
1boy 1girl 2016 2d animated_skeleton anonymous anonymous_female bigger_male blush blushing_male breasts cape carrying carrying_another carrying_partner closed_eyes clothed clothed/nude clothed_male clothed_male_nude_female clothing dinkynsfw duo ectopenis embarrassed embarrassed_male erection face_between_breasts face_in_breasts face_on_breast fellatio female frenulum frenum genitals gloves hetero hugging humanoid interspecies larger_male licking licking_penis looking_away male male/female monster nipples nude nude_female nude_female_clothed_male oral papyrus_(undertale) penile penis penis_grab penis_lick scarf seme_papyrus sex skeleton smaller_female sweat teeth text top_papyrus traditional_media undead undertale undertale_(series) video_games
1boy 1girl 2016 2d animated_skeleton anonymous anonymous_female bigger_male blush blushing_male breasts cape carrying carrying_another carrying_partner closed_eyes clothed clothed/nude clothed_male clothed_male_nude_female clothing dinkynsfw duo ectopenis embarrassed embarrassed_male erection face_between_breasts face_in_breasts face_on_breast fellatio female frenulum frenum genitals gloves hetero hugging humanoid interspecies larger_male licking licking_penis looking_away male male/female monster nipples nude nude_female nude_female_clothed_male oral papyrus_(undertale) penile penis penis_grab penis_lick scarf seme_papyrus sex skeleton smaller_female sweat teeth text top_papyrus traditional_media undead undertale undertale_(series) video_games
2020s 2023 2boys 2d 2d_(artwork) animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothing comic comic_panel cum cum_on_head cum_splatter digital_media_(artwork) dominant dominant_male drooling duo ectopenis extreme_size_difference fontcest frotting gloves heart heart-shaped_pupils heart_eyes hoodie implied_bottomless implied_penis incest jacket larger_male macro macrophilia male male/male male_only maledom malesub micro microphilia monster orange_cum orange_penis papyrus papyrus_(undertale) papysans partially_colored penis purplebluepen45 sans sans_(undertale) seme_papyrus size_difference skeleton slippers small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus soul submissive submissive_male thrusting top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi youfoundta
2020s 2023 2boys 2d 2d_(artwork) animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothing comic comic_panel cum cum_on_head cum_splatter digital_media_(artwork) dominant dominant_male drooling duo ectopenis extreme_size_difference fontcest frotting gloves heart heart-shaped_pupils heart_eyes hoodie implied_bottomless implied_penis incest jacket larger_male macro macrophilia male male/male male_only maledom malesub micro microphilia monster orange_cum orange_penis papyrus papyrus_(undertale) papysans partially_colored penis purplebluepen45 sans sans_(undertale) seme_papyrus size_difference skeleton slippers small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus soul submissive submissive_male thrusting top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi youfoundta
1boy 1cuntboy anger_vein animated_skeleton artist_name ass big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male boots bottom_sans bottomless bottomless_cuntboy brother brother/brother brother_and_brother brothers clothed clothing cobe-87 cuntboy cuntboysub dominant dominant_male domination duo ectobody ectobutt ectopussy english_text fontcest hoodie incest jacket larger_male male male/cuntboy maledom monochrome monster papyrus papyrus_(undertale) papysans partially_colored profanity punishment pussy pussy_juice sans sans_(undertale) seme_papyrus size_difference skeleton small_sub small_sub_big_dom smaller_cuntboy smaller_sub smaller_sub_bigger_dom spank_marks spanking spanking_ass spanking_butt speech_bubble submissive submissive_cuntboy talking_to_another tears text text_bubble top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
1boy 1cuntboy anger_vein animated_skeleton artist_name ass big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male boots bottom_sans bottomless bottomless_cuntboy brother brother/brother brother_and_brother brothers clothed clothing cobe-87 cuntboy cuntboysub dominant dominant_male domination duo ectobody ectobutt ectopussy english_text fontcest hoodie incest jacket larger_male male male/cuntboy maledom monochrome monster papyrus papyrus_(undertale) papysans partially_colored profanity punishment pussy pussy_juice sans sans_(undertale) seme_papyrus size_difference skeleton small_sub small_sub_big_dom smaller_cuntboy smaller_sub smaller_sub_bigger_dom spank_marks spanking spanking_ass spanking_butt speech_bubble submissive submissive_cuntboy talking_to_another tears text text_bubble top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
1:1 1:1_aspect_ratio 1boy 1cuntboy 2020s 2022 2d 2d_(artwork) animated_skeleton artist_name artist_watermark black_legwear blue_pussy bottom_sans brother brother/brother brother_and_brother brothers cuntboy digital_media_(artwork) duo ectopussy empath__life fingering fingering_another fingering_pussy fontcest gif grey_background hand_on_another's_face hand_on_face incest intraspecies legs_apart legwear male male/male monochrome monster monster_boy nude one_eye_closed papyrus papyrus_(undertale) papysans pussy sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings simple_background sitting skeleton tel_a_friend top_papyrus twitter uke_sans undead undertale undertale_(series) video_game_character video_games watermark yaoi
1:1 1:1_aspect_ratio 1boy 1cuntboy 2020s 2022 2d 2d_(artwork) animated_skeleton artist_name artist_watermark black_legwear blue_pussy bottom_sans brother brother/brother brother_and_brother brothers cuntboy digital_media_(artwork) duo ectopussy empath__life fingering fingering_another fingering_pussy fontcest gif grey_background hand_on_another's_face hand_on_face incest intraspecies legs_apart legwear male male/male monochrome monster monster_boy nude one_eye_closed papyrus papyrus_(undertale) papysans pussy sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings simple_background sitting skeleton tel_a_friend top_papyrus twitter uke_sans undead undertale undertale_(series) video_game_character video_games watermark yaoi
2017 2boys 2d animal animated_skeleton annoying_dog_(undertale) bottom_sans brother/brother brothers canid canine canis clothed clothed_male clothing comic comic_panel comic_sans digital_media dog domestic_dog english_text feral fontcest hoodie incest jacket lowest-of-dirt male male/male male_only monster pants_bulge papyrus_(font) papyrus_(undertale) papysans pinned_down sans_(undertale) seme_papyrus skeleton speech_bubble talking_to_another teeth text top_papyrus undead undertale undertale_(series) video_game_character video_games white_background yaoi
2017 2boys 2d animal animated_skeleton annoying_dog_(undertale) bottom_sans brother/brother brothers canid canine canis clothed clothed_male clothing comic comic_panel comic_sans digital_media dog domestic_dog english_text feral fontcest hoodie incest jacket lowest-of-dirt male male/male male_only monster pants_bulge papyrus_(font) papyrus_(undertale) papysans pinned_down sans_(undertale) seme_papyrus skeleton speech_bubble talking_to_another teeth text top_papyrus undead undertale undertale_(series) video_game_character video_games white_background yaoi
2010s 2017 2d 4boys animated_skeleton blue_blush blue_tongue blush bottom_sans bukkake clothed clothing cum cum_in_mouth cum_on_tongue digital_media ectotongue fangs finger_in_mouth fontcest gangbang grillby grillsans hand implied_incest lowest-of-dirt male male/male male_focus male_only monster multiple_boys one_eye_closed orange_cum orange_penis papyrus_(undertale) papysans penis red_background sans_(undertale) sanster seme_gaster seme_grillby seme_papyrus sex skeleton solo_focus tongue top_gaster top_grillby top_papyrus uke_sans undead undertale undertale_(series) unseen_character unseen_male unseen_male_face upper_body video_game_character video_games w.d._gaster yaoi
2010s 2017 2d 4boys animated_skeleton blue_blush blue_tongue blush bottom_sans bukkake clothed clothing cum cum_in_mouth cum_on_tongue digital_media ectotongue fangs finger_in_mouth fontcest gangbang grillby grillsans hand implied_incest lowest-of-dirt male male/male male_focus male_only monster multiple_boys one_eye_closed orange_cum orange_penis papyrus_(undertale) papysans penis red_background sans_(undertale) sanster seme_gaster seme_grillby seme_papyrus sex skeleton solo_focus tongue top_gaster top_grillby top_papyrus uke_sans undead undertale undertale_(series) unseen_character unseen_male unseen_male_face upper_body video_game_character video_games w.d._gaster yaoi
2020s 2022 2boys 2d 2d_(artwork) anal animated_skeleton artist_name artist_watermark begging_for_more blue_blush blush blush_lines blushing_male bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers carrying_another carrying_partner carrying_position clothed clothing comic_sans cussing digital_media_(artwork) dominant dominant_male duo ectoplasm empath__life english_text fontcest from_front_position glowing glowing_genitalia grey_background incest intraspecies male male/male male_only maledom malesub moaning monster monster_boy orange_blush papyrus papyrus_(font) papyrus_(undertale) papysans partially_colored penetration penetration_from_front profanity sans sans_(undertale) seme_papyrus sex sex_from_front sibling_incest siblings simple_background skeleton solid_color_background stand_and_carry_position standing submissive submissive_male suspended_congress swearing sweat tel_a_friend text top_papyrus twitter uke_sans undead undertale undertale_(series) video_game_character video_games watermark yaoi
2020s 2022 2boys 2d 2d_(artwork) anal animated_skeleton artist_name artist_watermark begging_for_more blue_blush blush blush_lines blushing_male bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers carrying_another carrying_partner carrying_position clothed clothing comic_sans cussing digital_media_(artwork) dominant dominant_male duo ectoplasm empath__life english_text fontcest from_front_position glowing glowing_genitalia grey_background incest intraspecies male male/male male_only maledom malesub moaning monster monster_boy orange_blush papyrus papyrus_(font) papyrus_(undertale) papysans partially_colored penetration penetration_from_front profanity sans sans_(undertale) seme_papyrus sex sex_from_front sibling_incest siblings simple_background skeleton solid_color_background stand_and_carry_position standing submissive submissive_male suspended_congress swearing sweat tel_a_friend text top_papyrus twitter uke_sans undead undertale undertale_(series) video_game_character video_games watermark yaoi
2020s 2022 2boys 2d 2d_(artwork) animated_skeleton artist_name beetleevil blue_blush blue_hoodie blue_jacket blush blushing_male bottom_sans brother brother/brother brother_and_brother brothers clothed clothing covering_mouth covering_own_mouth crying digital_media_(artwork) drooling duo ectopenis english_text evilbeetle eye_fucking eye_penetration fellatio fontcest genitals gloves heart-shaped_pupils heart_eyes holding_hands hooded_jacket hoodie incest intraspecies jacket male male/male male_only monster monster_boy multiple_views oral orange_blush orange_penis papyrus papyrus_(undertale) papysans penis penis_in_eye penis_in_mouth penis_through_clothing red_gloves sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton skull_fucking soul soul_sex sucking_penis tears text top_papyrus twitter uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2020s 2022 2boys 2d 2d_(artwork) animated_skeleton artist_name beetleevil blue_blush blue_hoodie blue_jacket blush blushing_male bottom_sans brother brother/brother brother_and_brother brothers clothed clothing covering_mouth covering_own_mouth crying digital_media_(artwork) drooling duo ectopenis english_text evilbeetle eye_fucking eye_penetration fellatio fontcest genitals gloves heart-shaped_pupils heart_eyes holding_hands hooded_jacket hoodie incest intraspecies jacket male male/male male_only monster monster_boy multiple_views oral orange_blush orange_penis papyrus papyrus_(undertale) papysans penis penis_in_eye penis_in_mouth penis_through_clothing red_gloves sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton skull_fucking soul soul_sex sucking_penis tears text top_papyrus twitter uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2017 2boys anal anal_penetration anal_sex animated_skeleton balls bed bedroom biting_pillow blanket blue_blush blue_body blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers bulge clothed clothing comic comic_page comic_panel crying crying_with_eyes_open dry_humping duo ectobody ectopenis edit edited erection erection_under_clothes fontcest glowing glowing_eye glowing_genitalia glowing_penis groping groping_from_behind hand_in_pants hand_under_clothes humping incest indoors intraspecies large_filesize laying_on_bed looking_at_another looking_at_each_other lying_on_bed male male/male male_only male_penetrated male_penetrating male_penetrating_male monochrome monster monster_boy on_bed on_side orange_balls orange_blush orange_body orange_penis orange_testicles papyrus papyrus_(undertale) papysans partially_colored penetration penis penis_in_anus profanity sans sans_(undertale) seme_papyrus sequence sequential sex sex_on_bed sibling_incest siblings skeleton sleeping sleeping_together supermuuh surprised surprised_expression sweat tears testicles text third-party_edit top_papyrus uke_sans undead under_blanket undertale undertale_(series) waking_up yaoi
2010s 2017 2boys anal anal_penetration anal_sex animated_skeleton balls bed bedroom biting_pillow blanket blue_blush blue_body blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers bulge clothed clothing comic comic_page comic_panel crying crying_with_eyes_open dry_humping duo ectobody ectopenis edit edited erection erection_under_clothes fontcest glowing glowing_eye glowing_genitalia glowing_penis groping groping_from_behind hand_in_pants hand_under_clothes humping incest indoors intraspecies large_filesize laying_on_bed looking_at_another looking_at_each_other lying_on_bed male male/male male_only male_penetrated male_penetrating male_penetrating_male monochrome monster monster_boy on_bed on_side orange_balls orange_blush orange_body orange_penis orange_testicles papyrus papyrus_(undertale) papysans partially_colored penetration penis penis_in_anus profanity sans sans_(undertale) seme_papyrus sequence sequential sex sex_on_bed sibling_incest siblings skeleton sleeping sleeping_together supermuuh surprised surprised_expression sweat tears testicles text third-party_edit top_papyrus uke_sans undead under_blanket undertale undertale_(series) waking_up yaoi
2010s 2017 2boys 2d 2d_(artwork) anal anal_penetration anal_sex animated_skeleton balls bed bedroom biting_pillow blanket blue_blush blue_body blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers bulge clothed clothing comic comic_page comic_panel crying crying_with_eyes_open digital_media_(artwork) dry_humping duo ectobody ectopenis edit edited erection erection_under_clothes fontcest glowing glowing_eye glowing_genitalia glowing_penis groping groping_from_behind hand_in_pants hand_under_clothes humping incest indoors intraspecies large_filesize long_image looking_at_another looking_at_each_other lying_on_bed male male/male male_only male_penetrated male_penetrating male_penetrating_male monochrome monster monster_boy multiple_images on_bed on_side orange_balls orange_blush orange_body orange_penis orange_testicles papyrus papyrus_(undertale) papysans partially_colored penetration penis penis_in_anus profanity sans sans_(undertale) seme_papyrus sequence sequential sex sex_on_bed sibling_incest siblings skeleton sleeping sleeping_together supermuuh surprised surprised_expression sweat tall_image tears testicles text third-party_edit top_papyrus uke_sans undead under_blanket undertale undertale_(series) video_games waking_up yaoi
2010s 2017 2boys 2d 2d_(artwork) anal anal_penetration anal_sex animated_skeleton balls bed bedroom biting_pillow blanket blue_blush blue_body blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers bulge clothed clothing comic comic_page comic_panel crying crying_with_eyes_open digital_media_(artwork) dry_humping duo ectobody ectopenis edit edited erection erection_under_clothes fontcest glowing glowing_eye glowing_genitalia glowing_penis groping groping_from_behind hand_in_pants hand_under_clothes humping incest indoors intraspecies large_filesize long_image looking_at_another looking_at_each_other lying_on_bed male male/male male_only male_penetrated male_penetrating male_penetrating_male monochrome monster monster_boy multiple_images on_bed on_side orange_balls orange_blush orange_body orange_penis orange_testicles papyrus papyrus_(undertale) papysans partially_colored penetration penis penis_in_anus profanity sans sans_(undertale) seme_papyrus sequence sequential sex sex_on_bed sibling_incest siblings skeleton sleeping sleeping_together supermuuh surprised surprised_expression sweat tall_image tears testicles text third-party_edit top_papyrus uke_sans undead under_blanket undertale undertale_(series) video_games waking_up yaoi
2010s 2017 2boys anal anal_penetration anal_sex animated_skeleton balls bed bedroom blanket blue_blush blue_body blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing comic comic_page comic_panel crying crying_with_eyes_open duo ectobody ectopenis fontcest glowing glowing_eye incest indoors intraspecies laying_on_bed lying_on_bed male male/male male_only male_penetrated male_penetrating male_penetrating_male monochrome monster monster_boy on_bed on_side orange_balls orange_blush orange_body orange_penis orange_testicles papyrus papyrus_(undertale) papysans partially_colored penetration penis penis_in_anus sans sans_(undertale) seme_papyrus sequence sequential sex sex_on_bed sibling_incest siblings skeleton supermuuh tears testicles top_papyrus uke_sans undead undertale undertale_(series) yaoi
2010s 2017 2boys anal anal_penetration anal_sex animated_skeleton balls bed bedroom blanket blue_blush blue_body blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing comic comic_page comic_panel crying crying_with_eyes_open duo ectobody ectopenis fontcest glowing glowing_eye incest indoors intraspecies laying_on_bed lying_on_bed male male/male male_only male_penetrated male_penetrating male_penetrating_male monochrome monster monster_boy on_bed on_side orange_balls orange_blush orange_body orange_penis orange_testicles papyrus papyrus_(undertale) papysans partially_colored penetration penis penis_in_anus sans sans_(undertale) seme_papyrus sequence sequential sex sex_on_bed sibling_incest siblings skeleton supermuuh tears testicles top_papyrus uke_sans undead undertale undertale_(series) yaoi
2010s 2017 2boys animated_skeleton bed bedroom blanket blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothing comic comic_page comic_panel crying crying_with_eyes_open duo fontcest glowing glowing_eye incest indoors laying_on_bed looking_at_another looking_at_each_other lying_on_bed male male/male male_only monochrome on_bed orange_blush papyrus papyrus_(undertale) papysans partially_colored profanity sans sans_(undertale) seme_papyrus sequence sequential skeleton supermuuh tears text top_papyrus uke_sans undead undertale undertale_(series) waking_up yaoi
2010s 2017 2boys animated_skeleton bed bedroom blanket blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothing comic comic_page comic_panel crying crying_with_eyes_open duo fontcest glowing glowing_eye incest indoors laying_on_bed looking_at_another looking_at_each_other lying_on_bed male male/male male_only monochrome on_bed orange_blush papyrus papyrus_(undertale) papysans partially_colored profanity sans sans_(undertale) seme_papyrus sequence sequential skeleton supermuuh tears text top_papyrus uke_sans undead undertale undertale_(series) waking_up yaoi
2010s 2017 2boys animated_skeleton bed bedroom biting_pillow blanket blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothing comic comic_page comic_panel crying duo fontcest glowing glowing_genitalia groping groping_from_behind hand_in_pants hand_under_clothes incest indoors laying_on_bed lying_on_bed male male/male male_only monochrome on_bed papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sequence sequential skeleton supermuuh surprised surprised_expression tears top_papyrus uke_sans undead under_blanket undertale undertale_(series) yaoi
2010s 2017 2boys animated_skeleton bed bedroom biting_pillow blanket blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothing comic comic_page comic_panel crying duo fontcest glowing glowing_genitalia groping groping_from_behind hand_in_pants hand_under_clothes incest indoors laying_on_bed lying_on_bed male male/male male_only monochrome on_bed papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sequence sequential skeleton supermuuh surprised surprised_expression tears top_papyrus uke_sans undead under_blanket undertale undertale_(series) yaoi
2010s 2017 2boys animated_skeleton bed bedroom biting_pillow blanket blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothing comic comic_page comic_panel crying duo fontcest glowing glowing_genitalia incest indoors laying_on_bed lying_on_bed male male/male male_only monochrome on_bed papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sequence sequential skeleton supermuuh tears top_papyrus uke_sans undead under_blanket undertale undertale_(series) yaoi
2010s 2017 2boys animated_skeleton bed bedroom biting_pillow blanket blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothing comic comic_page comic_panel crying duo fontcest glowing glowing_genitalia incest indoors laying_on_bed lying_on_bed male male/male male_only monochrome on_bed papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sequence sequential skeleton supermuuh tears top_papyrus uke_sans undead under_blanket undertale undertale_(series) yaoi