gelbooruhttps://xbooru.com/index.php?page=atom&tags=1boy 2020s 2023 animated skeleton blue eye blue penis bottomless bottomless male clothed clothing ectopenis ectoplasm grey background kneel male male only mellouwana monster partially clothed partially clothed male penis sans sans (undertale) simple background skeleton sketch solid color background solo male undead undertale undertale (series)2024-05-18T00:25:19Zgelbooru