gelbooruhttps://xbooru.com/index.php?page=atom&tags=2010s 2015 2d 2d (artwork) animated skeleton bad id bad tumblr id blue background bottom sans collar collar and leash digital media (artwork) english text leash leash and collar male monster naked noxiousaberration nude sans sans (undertale) simple background skeleton submissive submissive male text uke sans undead undertale undertale (series) upper body video games2024-05-14T10:35:11Zgelbooru