Xbooru - 2010s 2016 2boys 2d 2d (artwork) alldrawnup animated skeleton backwards hat blue blush blush bottom sans brother brother/brother brother and brother brothers cap couch digital media (artwork) dominant duo english text fontcest gay grabbing another's chin grabbing chin groping hand under clothes hand under shirt hat imminent sex incest male male/male male only monochrome monster official alternate costume one eye closed papyrus papyrus (undertale) papysans partially colored sans sans (undertale) seme papyrus sitting on couch sitting on sofa skeleton slippers sofa submissive text top papyrus uke sans undead undertale undertale (series) video games white background yaoi