gelbooruhttps://xbooru.com/index.php?page=atom&tags=2boys animated skeleton blue blush blush bottom sans creampiesummer duo english text fire elemental grillby grillby (undertale) grillsans implied sex kotatsu male male only male penetrating monster pixiv id 10096809 sans sans (undertale) seme grillby skeleton sweat text top grillby uke sans undead undertale undertale (series) video games yaoi2024-05-23T17:50:42Zgelbooru