At the Music Ray'n Girls Haru Choco Matsuri event in 2009, it is announced that she and other Music Ray'n affiliated voice actresses Haruka Tomatsu, Ayahi Takagaki and Minako Kotobuki will form the unit Sphere, and they released their first single "Future Stream" on April 22, 2009, and was used as the opening theme of Hatsukoi Limited.