Xbooru - 1boy 2d 2d (artwork) animated skeleton blue blush blue tongue blush bottom sans digital media (artwork) disembodied hand drooling ectotongue english text hand heart-shaped pupils heart eyes heart shaped pupils male male focus male only malesub monochrome monster open mouth panting partially colored sans sans (undertale) simple background singingsans skeleton solo male submissive submissive male text third-party source tongue uke sans undead undertale undertale (series) video games