Xbooru - 13thcatofthegate 2010s 2018 2boys 2d 2d (artwork) 2males all fours anal animated skeleton bigger male bigger penetrating bigger penetrating smaller blue blush blue cum blue eye blue penis blue tongue blush bottom sans brother/brother brother penetrating brother brothers comic comic page comic panel comic sans completely nude completely nude male cum cum on sheets cum while penetrated digital media (artwork) doggy position drooling duo ectopenis ectotongue ejaculation english text fontcest from behind position genital fluids genitals glowing eye handjob handjob while penetrating incest indoors larger male larger penetrating larger penetrating smaller male male/male male only male penetrated male penetrating male penetrating male monster nude nude male orange blush orange eye orange penis orgasm papyrus papyrus (undertale) papysans partially colored penetration penetration from behind penis sans sans (undertale) seme papyrus sequence sequential sex sex from behind shorter male skeleton smaller male smaller penetrated speech bubble taller male text text bubble tongue tongue out top papyrus uke sans undead undertale undertale (series) video game character video games yaoi | 1027063

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13thcatofthegate 2010s 2018 2boys 2d 2d_(artwork) 2males all_fours anal animated_skeleton bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_cum blue_eye blue_penis blue_tongue blush bottom_sans brother/brother brother_penetrating_brother brothers comic comic_page comic_panel comic_sans completely_nude completely_nude_male cum cum_on_sheets cum_while_penetrated digital_media_(artwork) doggy_position drooling duo ectopenis ectotongue ejaculation english_text fontcest from_behind_position genital_fluids genitals glowing_eye handjob handjob_while_penetrating incest indoors larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male monster nude nude_male orange_blush orange_eye orange_penis orgasm papyrus papyrus_(undertale) papysans partially_colored penetration penetration_from_behind penis sans sans_(undertale) seme_papyrus sequence sequential sex sex_from_behind shorter_male skeleton smaller_male smaller_penetrated speech_bubble taller_male text text_bubble tongue tongue_out top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi

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