gelbooruhttps://xbooru.com/index.php?page=atom&tags=2020s 2022 2d 2d (artwork) animated skeleton blue blush blue hoodie blue jacket blue tongue blush bottom sans clothed crying duo gaster gaster (undertale) hooded jacket hoodie jacket japanese text logo (pixiv30462562) male male penetrating monster penetration pixiv id 30462562 sans sans (undertale) sanster seme gaster sex skeleton sweat tears text tongue top gaster uke sans undead undertale undertale (series) video games yaoi2024-05-09T13:56:08Zgelbooru