Xbooru - 2boys 2d 2d (artwork) 3koma anal animated skeleton begging for more blue blush blush bottom sans bottomless bottomless male breasts brother brother/brother brother and brother brother penetrating brother brothers clothed clothing comic comic panel digital media (artwork) drooling duo fontcest from front position hand on another's head hand on head hooded jacket hoodie incest jacket male male/male male only male penetrating male penetrating male misake-san missionary position moaning monster motion lines orange blush papyrus papyrus (undertale) papysans rough sex sans sans (undertale) seme papyrus sex skeleton socks speech bubble sweat thrusting top papyrus uke sans undead undertale undertale (series) unseen male face video game character video games yaoi