Xbooruhttps://xbooru.com/index.php?page=atom&tags=2010s 2019 2boys 2d 2d (artwork) animated skeleton bigger male bottom sans clothed clothed male digital media (artwork) duo elemental creature elemental humanoid fire elemental gay grillby grillsans humanoid larger male male male/male male only monochrome monster monster boy sans sans (undertale) seme grillby simple background size difference skeleton top grillby tumblr uke sans undead undertale undertale (series) ut-2828282928 video games white background yaoi2024-10-19T12:25:18ZXbooru