gelbooruhttps://xbooru.com/index.php?page=atom&tags=2010s 2016 2boys 2d 2d (artwork) animated skeleton blue blush blush bone creampiesummer digital media (artwork) duo english text fire elemental gay grillby grillby (undertale) grillsans male male/male male only monster orange body sans sans (undertale) sansby skeleton sounding text text bubble undead undertale undertale (series) urethral urethral insertion video game character video games white background yaoi2024-05-13T23:48:59Zgelbooru