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1boy 1cuntboy 2010s 2016 2d 2d_(artwork) ahegao animated_skeleton artist_name blue_blush blue_body blue_tongue blush bodily_fluids bottom_sans bottomless bottomless_cuntboy brother brother/brother brother_and_brother brother_penetrating_brother brothers brown_background carrying carrying_partner carrying_position clothed clothing cuntboy cuntboy_penetrated digital_media_(artwork) duo ectobody ectopenis ectoplasm ectopussy ectotongue english_text fangs fontcest gasterass genitals gradient_legwear heart-shaped_pupils incest intraspecies legwear male male/cuntboy male_penetrating male_penetrating_cuntboy monster monster_boy nude orange_body orange_penis orange_tongue orsnge_blush papyrus papyrus_(undertale) papysans penetration penis pleasure_face profanity pussy sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background sitting skeleton solid_color_background speech_bubble stockings talking talking_to_another talking_to_partner text thighhighs tongue tongue_out top_papyrus topwear two-tone_legwear two_tone_legwear uke_sans undead undertale undertale_(series) vaginal vaginal_penetration vaginal_sex video_game_character video_games yaoi

1boy 1cuntboy 2010s 2016 2d 2d_(artwork)ahegao animated_skeleton artist_name blue_blush blue_body blue_tongue blush bodily_fluids bottom_sans bottomless bottomless_cuntboy brother brother/brother brother_and_brother brother_penetrating_brother brothers brown_background carrying carrying_partner carrying_position clothed clothing cuntboy cuntboy_penetrated digital_media_(artwork)duo ectobody ectopenis ectoplasm ectopussy ectotongue english_text fangs fontcest gasterass genitals gradient_legwear heart-shaped_pupils incest intraspecies legwear male male/cuntboy male_penetrating male_penetrating_cuntboy monster monster_boy nude orange_body orange_penis orange_tongue orsnge_blush papyrus papyrus_(undertale)papysans penetration penis pleasure_face profanity pussy sans sans_(undertale)seme_papyrus sex sibling_incest siblings simple_background sitting skeleton solid_color_background speech_bubble stockings talking talking_to_another talking_to_partner text thighhighs tongue tongue_out top_papyrus topwear two-tone_legwear two_tone_legwear uke_sans undead undertale undertale_(series)vaginal vaginal_penetration vaginal_sex video_game_character video_games yaoi

1boy 1cuntboy 2010s 2016 2d 2d_(artwork) ahegao animated_skeleton artist_name blue_blush blue_body blue_tongue blush bodily_fluids bottom_sans bottomless bottomless_cuntboy brother brother/brother brother_and_brother brother_penetrating_brother brothers brown_background carrying carrying_partner carrying_position clothed clothing cuntboy cuntboy_penetrated digital_media_(artwork) duo ectobody ectopenis ectoplasm ectopussy ectotongue english_text fangs fontcest gasterass genitals gradient_legwear heart-shaped_pupils incest intraspecies legwear male male/cuntboy male_penetrating male_penetrating_cuntboy monster monster_boy nude orange_body orange_penis orange_tongue orsnge_blush papyrus papyrus_(undertale) papysans penetration penis pleasure_face profanity pussy sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background sitting skeleton solid_color_background speech_bubble stockings talking talking_to_another talking_to_partner text thighhighs tongue tongue_out top_papyrus topwear two-tone_legwear two_tone_legwear uke_sans undead undertale undertale_(series) vaginal vaginal_penetration vaginal_sex video_game_character video_games yaoi

2010s 2boys 2d 2d_(artwork) anal anal_penetration anal_sex animated_skeleton armwear artist_name ass ass_grab backsack bell_choker bell_collar bent_over blush bottom_sans breasts brother brother/brother brother_penetrating_brother brothers bulging_eyes christmas christmas_hat christmas_outfit christmas_tree cleavage clothed clothing comic comic_panel counter crossdressing digital_media_(artwork) dress dress_lift duo ectobody ectobreasts ectobutt ectopenis ectoplasm edit edited eli-sin-g english_text fontcest from_behind_position gift gift_box gloves grabbing_own_penis hat holidays incest intraspecies kitchen kitchen_counter kolesjoie male male/male male_only male_penetrated male_penetrating male_penetrating_male male_with_breasts merry_christmas monochrome monster monster_boy moobs panties papyrus papyrus_(undertale) papysans penetration penetration_from_behind penis penis_grab profanity ribbon_choker ribbon_collar sans sans_(undertale) santa_costume santa_dress santa_hat scarf seducing seductive seme_papyrus sex sex_from_behind sibling_incest siblings skeleton striptease talking testicle text thighs third-party_edit top_papyrus topwear uke_sans undead undertale undertale_(series) veiny_penis video_game_character video_games wink yaoi

2010s 2boys 2d 2d_(artwork) anal anal_penetration anal_sex animated_skeleton armwear artist_name ass ass_grab backsack bell_choker bell_collar bent_over blush bottom_sans breasts brother brother/brother brother_penetrating_brother brothers bulging_eyes christmas christmas_hat christmas_outfit christmas_tree cleavage clothed clothing comic comic_panel counter crossdressing digital_media_(artwork) dress dress_lift duo ectobody ectobreasts ectobutt ectopenis ectoplasm edit edited eli-sin-g english_text fontcest from_behind_position gift gift_box gloves grabbing_own_penis hat holidays incest intraspecies kitchen kitchen_counter kolesjoie male male/male male_only male_penetrated male_penetrating male_penetrating_male male_with_breasts merry_christmas monochrome monster monster_boy moobs panties papyrus papyrus_(undertale) papysans penetration penetration_from_behind penis penis_grab profanity ribbon_choker ribbon_collar sans sans_(undertale) santa_costume santa_dress santa_hat scarf seducing seductive seme_papyrus sex sex_from_behind sibling_incest siblings skeleton striptease talking testicle text thighs top_papyrus topwear uke_sans undead undertale undertale_(series) veiny_penis video_game_character video_games wink yaoi