Xbooru - 2010s 2018 3koma animated skeleton bigger penetrating bigger penetrating smaller blue blush blue penis blush bottom on top bottom sans bottomless bottomless male brother brother/brother brother and brother brother penetrating brother brothers comic comic panel comic sans drooling duo ectopenis english text fallen9choirs fontcest gay gloves incest larger penetrating larger penetrating smaller male male/male male only male penetrating male penetrating male orange blush orange penis papyrus papyrus (font) papyrus (undertale) papysans partially clothed partially clothed male penetration power bottom red gloves red scarf sans sans (undertale) scarf seme papyrus sex skeleton smaller penetrated speech bubble sweat text text bubble thought bubble top papyrus topwear uke sans undead undertale undertale (series) yaoi