gelbooruhttps://xbooru.com/index.php?page=atom&tags=1:1 1:1 aspect ratio 1boy 2d 2d (artwork) animated skeleton back view blush bottom sans bound bound wrists digital media (artwork) looking at viewer looking back looking back at viewer male male only malesub monster no visible genitalia nude nude male nudity sacrum lacing sans sans (undertale) skeleton solo male soul string submissive submissive male sweat tied wrists uke sans undead undertale undertale (series) unknown artist video game character video games white background2024-05-17T20:05:24Zgelbooru