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sinncognito

2020s 2022 2boys 2d 2d_(artwork) all_fours alternate_costume animated_skeleton antler_headband bell_collar blue_blush blue_body blue_hoodie blue_jacket blush boots bottom_sans boxers_(clothing) brother brother/brother brother_and_brother brothers candle candles christmas christmas_present christmas_sock christmas_tree clothed collar cookie couch digital_media_(artwork) duo ectobody ectopenis ectotongue fellatio floor fontcest furniture gift_box glass gloves green_couch hand_on_another's_head holidays hooded_jacket hoodie incest indoors jacket living_room male male/male male_only merry_christmas monster monster_boy on_floor oral oral_sex orange_blush orange_penis orange_tongue pants_on_floor pants_removed papyrus papyrus_(undertale) papysans penis plate red_boots red_gloves red_hoodie red_jacket red_socks sans sans_(undertale) santa_hat seme_papyrus sex sibling_incest siblings sinncognito sitting sitting_on_floor skeleton socks socks_on sucking_penis top_papyrus uke_sans undead undertale undertale_(series) video_games window yaoi
2020s 2022 2boys 2d 2d_(artwork) all_fours alternate_costume animated_skeleton antler_headband bell_collar blue_blush blue_body blue_hoodie blue_jacket blush boots bottom_sans boxers_(clothing) brother brother/brother brother_and_brother brothers candle candles christmas christmas_present christmas_sock christmas_tree clothed collar cookie couch digital_media_(artwork) duo ectobody ectopenis ectotongue fellatio floor fontcest furniture gift_box glass gloves green_couch hand_on_another's_head holidays hooded_jacket hoodie incest indoors jacket living_room male male/male male_only merry_christmas monster monster_boy on_floor oral oral_sex orange_blush orange_penis orange_tongue pants_on_floor pants_removed papyrus papyrus_(undertale) papysans penis plate red_boots red_gloves red_hoodie red_jacket red_socks sans sans_(undertale) santa_hat seme_papyrus sex sibling_incest siblings sinncognito sitting sitting_on_floor skeleton socks socks_on sucking_penis top_papyrus uke_sans undead undertale undertale_(series) video_games window yaoi
2020 2020s 2boys 2d 2d_(artwork) animated_skeleton blue_eyes blue_tongue bottom_sans brother brother/brother brother_and_brother brothers clothed dark dark_background digital_media_(artwork) fellatio fellatio_pov fontcest genitals glowing glowing_genitalia glowing_penis grabbing_penis incest licking licking_penis male male_only male_pov monster monster_boy oral orange_penis papyrus papyrus_(undertale) papysans penis pov sans sans_(undertale) seme_papyrus sex sinncognito skeleton solo_focus top_papyrus twitter uke_sans undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games yaoi
2020 2020s 2boys 2d 2d_(artwork) animated_skeleton blue_eyes blue_tongue bottom_sans brother brother/brother brother_and_brother brothers clothed dark dark_background digital_media_(artwork) fellatio fellatio_pov fontcest genitals glowing glowing_genitalia glowing_penis grabbing_penis incest licking licking_penis male male_only male_pov monster monster_boy oral orange_penis papyrus papyrus_(undertale) papysans penis pov sans sans_(undertale) seme_papyrus sex sinncognito skeleton solo_focus top_papyrus twitter uke_sans undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games yaoi
2010s 2017 2boys 2d 2d_(artwork) animated_skeleton big_penis bottom_sans brother brother/brother brother_penetrating_brother brothers completely_nude digital_media_(artwork) duo ectopenis fontcest from_front_position glowing glowing_penis grabbing_leg grabbing_sheets gripping_sheets incest intraspecies male male/male male_only male_penetrating missionary missionary_position monster monster_boy nude orange_penis papyrus papyrus_(undertale) papysans penetration penis sans sans_(undertale) seme_papyrus sex sheet_grab sibling_incest siblings simple_background sinncognito skeleton tears tongue_out top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2017 2boys 2d 2d_(artwork) animated_skeleton big_penis bottom_sans brother brother/brother brother_penetrating_brother brothers completely_nude digital_media_(artwork) duo ectopenis fontcest from_front_position glowing glowing_penis grabbing_leg grabbing_sheets gripping_sheets incest intraspecies male male/male male_only male_penetrating missionary missionary_position monster monster_boy nude orange_penis papyrus papyrus_(undertale) papysans penetration penis sans sans_(undertale) seme_papyrus sex sheet_grab sibling_incest siblings simple_background sinncognito skeleton tears tongue_out top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi