gelbooruhttps://xbooru.com/index.php?page=atom&tags=2015 2d 2d (artwork) animated skeleton black background blue blush blush bottom sans clothed duo gaster gaster (undertale) groping hand hand on crotch hands male monster multiple hands sans sans (undertale) sanster seme gaster shirt up skeleton solo focus suckmytrombone sweater top gaster uke sans undead undertale undertale (series) video games2024-05-14T14:35:43Zgelbooru