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2020s 2022 2boys anal animated_skeleton bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_eyes blue_hoodie blue_jacket blue_penis blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers carne_392f carrying carrying_partner clothed dark_background duo ectopenis ectoplasm fellatio fellatio_pov fontcest glowing glowing_genitalia glowing_penis grabbing_legs hooded_jacket 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 multiple_views orange_blush orange_penis papyrus papyrus_(undertale) papysans partially_clothed sans sans_(undertale) seme_papyrus shirt_lift shirt_up sibling_incest siblings simple_background sitting skeleton smaller_male smaller_penetrated top_papyrus uke_sans undead undertale undertale_(series) yaoi

2020s 2022 2boys anal animated_skeleton bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_eyes blue_hoodie blue_jacket blue_penis blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers carne_392f carrying carrying_partner clothed dark_background duo ectopenis ectoplasm fellatio fellatio_pov fontcest glowing glowing_genitalia glowing_penis grabbing_legs hooded_jacket 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 multiple_views orange_blush orange_penis papyrus papyrus_(undertale)papysans partially_clothed sans sans_(undertale)seme_papyrus shirt_lift shirt_up sibling_incest siblings simple_background sitting skeleton smaller_male smaller_penetrated top_papyrus uke_sans undead undertale undertale_(series)yaoi

2020s 2022 2boys anal animated_skeleton bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_eyes blue_hoodie blue_jacket blue_penis blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers carne_392f carrying carrying_partner clothed dark_background duo ectopenis ectoplasm fellatio fellatio_pov fontcest glowing glowing_genitalia glowing_penis grabbing_legs hooded_jacket 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 multiple_views orange_blush orange_penis papyrus papyrus_(undertale) papysans partially_clothed sans sans_(undertale) seme_papyrus shirt_lift shirt_up sibling_incest siblings simple_background sitting skeleton smaller_male smaller_penetrated top_papyrus uke_sans undead undertale undertale_(series) yaoi

2020s 2021 2boys animated_skeleton bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers carrying carrying_another carrying_partner clothed cussing duo fontcest from_behind hand_in_pants incest larger_male male male/male male_only monster papyrus papyrus_(undertale) papysans profanity sans sans_(undertale) seme_papyrus shorter_male size_difference skeleton sketch smaller_male swearing taller_male text top_papyrus touching_crotch uke_sans undead undertale undertale_(series) white_background xxoxxkm_(pixiv_id_3871107) yaoi

1boy 1boy1girl 1girl 2010s 2015 2d 2d_(artwork) aged_up animated_skeleton blush bottomless bottomless_male carrying carrying_partner carrying_position digital_media_(artwork) duo ectopenis female female_frisk female_human femsub frisk frisk_(undertale) hetero human humanoid interspecies male male/female male_humanoid maledom monochrome monster monster_boy nude nude_female orange_blush orange_penis papyrisk papyrus papyrus_(undertale) partially_clothed partially_clothed_male partially_colored seme_papyrus skeleton stand_and_carry_position straight suspended_congress tentacle_penis top_papyrus undead undertale undertale_(series) unknown_artist unseen_female_face video_game_character video_games