Custum Tamago | -final- -witchuus-

Based on naming conventions in the doujin (independent) music and rhythm game scenes, this is almost certainly a song from the series (often romanized as Custom Tamago ) by the artist Umaru-chan / witCHuus (also stylized as witCHuuS).

It looks like you're referencing a specific music track or album title: . Custum Tamago -Final- -witCHuus-