gelbooruhttps://xbooru.com/index.php?page=atom&tags=2020s 2021 2boys 2d 2d (artwork) anal animated skeleton arched back black censor bar blue blush blush bottom sans bottomless bottomless male censor bar censored censored penis completely nude digital media (artwork) ectoplasm goma dango 555 japanese text kneeling male male only moaning monochrome monster nude nude male orange blush partially clothed partially colored penetration penis pixiv id 49095896 sans sans (undertale) sex skeleton socks socks on sweat text tongue tongue out toony uke sans undead undertale undertale (series) video games yaoi2024-05-11T12:44:58Zgelbooru