Xbooru - 1boy 2d 2d (artwork) animated skeleton blue blush blush bondage bottom sans bound bound wrists cussing digital media (artwork) disembodied hand disembodied hands drooling groping hands hands over head kneel kneeling magic hands male male focus male only malesub monochrome monster pants down pants pulled down partially colored profanity restrained sans sans (undertale) sequence sequential shirt lift shirt pulled up shirt up simple background singingsans skeleton solo male submissive submissive male swearing sweat third-party source tied up tied wrists touching crotch trembling uke sans undead undertale undertale (series) video games