Xbooru - 2010s 2018 2boys 2d 2d (artwork) alternate clothing alternate costume animated skeleton blue blush blue clothes blue clothing blue dress blue shirt blush bottom sans bottomless bottomless skirt brother/brother brothers clothed crossdressing digital media (artwork) duo english text fontcest ganzooky gay kneel male male/male monster nsfwsinningsans orange blush papyrus papyrus (undertale) papysans sans sans (undertale) seme papyrus simple background sitting skeleton socks text top papyrus uke sans undead undertale undertale (series) unzipped unzipped pants video game character video games white background yaoi