gelbooruhttps://xbooru.com/index.php?page=atom&tags=1boy 2010s 2016 2d 2d (artwork) animated skeleton barefeet blue blush blush cheztnuts closed eyes digital media (artwork) implied masturbation lying on side male male only monster sans sans (undertale) shirt pulled up shirt up simple background skeleton solo sweat undead undertale undertale (series) video game character video games2024-05-16T11:45:39Zgelbooru