Xbooru - 1:1 1:1 aspect ratio 2020s 2023 2boys 2d 2d (artwork) anal animated skeleton artist name balls blush blush lines bodily fluids bottom on top bottom sans brother brother/brother brother and brother brother penetrating brother brothers closed eyes clothed clothing completely nude completely nude male couch couch sex dominant dominant male duo ectopenis empath life fluids fontcest from behind position genitals incest leg grab legs apart making out male male/male male only maledom malesub monster monster boy nude nude male papyrus papyrus (undertale) papysans penetration penis precum sans sans (undertale) seme papyrus sex sibling incest siblings simple background sitting sitting on couch sitting on sofa sitting position skeleton sofa submissive submissive male tel a friend testicle top papyrus traditional art traditional media (artwork) twitter uke sans undead undertale undertale (series) video game character video games yaoi | 1030934

1:1 1:1_aspect_ratio 2020s 2023 2boys 2d 2d_(artwork) anal animated_skeleton artist_name balls blush blush_lines bodily_fluids bottom_on_top bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers closed_eyes clothed clothing completely_nude completely_nude_male couch couch_sex dominant dominant_male duo ectopenis empath__life fluids fontcest from_behind_position genitals incest leg_grab legs_apart making_out male male/male male_only maledom malesub monster monster_boy nude nude_male papyrus papyrus_(undertale) papysans penetration penis precum sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background sitting sitting_on_couch sitting_on_sofa sitting_position skeleton sofa submissive submissive_male tel_a_friend testicle top_papyrus traditional_art traditional_media_(artwork) twitter uke_sans undead undertale undertale_(series) video_game_character video_games yaoi

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