gelbooruhttps://xbooru.com/index.php?page=atom&tags=1:1 1:1 aspect ratio 2010s 2018 2boys after fellatio after oral animated skeleton black and white bottom sans brother brother/brother brother and brother brothers clothed clothing cum in mouth duo english text fontcest hoodie incest jacket kneeling male male/male male only maledom malesub monochrome monster papyrus papyrus (undertale) papysans sans sans (undertale) seme papyrus skeleton sketch solo focus submissive submissive male sympharin symphysins talking to another text top papyrus uke sans undead undertale undertale (series) unseen character video games white background yaoi2024-05-09T09:49:33Zgelbooru