Xbooru - 1boy 1boy2girls 2020 2020s 2 girls 2d 2d (artwork) 2girls alphys alphys (undertale) animated skeleton anthro artist name bed blanket blue body blue skin blush buckteeth dark room digital media (artwork) duo female female anthro fish fish girl hand on another's head implied after sex implied bisexual implied threesome itanatsu-chan lizard lizard girl looking at another male marine mff monster monster girl nude nude female nude male on bed papyrus papyrus (undertale) pillow red hair reptile reptile girl scalie scar across eye skeleton smile smiling smiling at another smiling at partner trio undead undertale undertale (series) undyne video game character video games yellow body yellow sclera yellow skin yellow teeth