Sakura Gakuin
In 2010, Mutō and Nakamoto joined idol group Sakura Gakuin, as one of the founding members, and as the Student Council President in the school theme of the group. Later that year, Mutō joined the group's first sub-unit Twinklestars, which acts as a school baton-twirling club. On March 25, 2012, she graduated from Sakura Gakuin.