Xbooru - ... 2020s 2023 2boys 2d 2d (artwork) ? animated skeleton black pants blue hoodie blue jacket book bottom sans brother brother/brother brother and brother brothers clothed clothing digital media (artwork) duo fontcest gloves holding book holding object hooded jacket hoodie implied incest jacket looking at crotch looking down male male/male male focus male only mianpigui monster pants papyrus papyrus (undertale) papysans penis red gloves sans sans (undertale) seme papyrus shirt lift shirt up skeleton spoken ellipsis sweat top papyrus uke sans undead undertale undertale (series) video game character video games wqw1201501125 yaoi