gelbooruhttps://xbooru.com/index.php?page=atom&tags=2010s 2018 2boys 2d 2d (artwork) animated skeleton artist name blue blush blush bottom sans clothed digital media (artwork) duo echoheartx elegantfolly fire fire elemental grillby grillby (undertale) grillsans imminent sex kneel male male/male male only partially clothed sans sans (undertale) skeleton topless topless male uke sans undead undertale undertale (series) undertale fanfiction video game character video games yaoi2024-06-17T00:10:52Zgelbooru