Xbooru - 2010s 2018 2boys 2d 2d (artwork) animated skeleton bed bedroom blue blush blue tongue blush bottom sans brother brother/brother brother and brother brothers chinese text clothed comic digital media (artwork) duo ectotongue fontcest gay incest indoors interlocked fingers intertwined fingers making out male male/male male only monochrome monster on bed orange blush orange tongue papyrus papyrus (undertale) papysans saliva trail sans sans (undertale) seme papyrus skeleton text text bubble top papyrus uke sans undead undertale undertale (series) upper body veah-3sin video games yaoi