The announcement was made on May 10 during her live performance Kotone no Hi -Sakura/Spring Road 2013 ~Ima Dake~ (コトネの日-Sakura/Spring Road 2013～イマダケ～-Final).
Kotone Mai, also known as Mainya, began her career in 2009.
During the event, Kotone Mai also told that she decided to become an idol because she was originally a fan of Hello! Project. One of her dreams is to hold a concert at Nakano Sun Plaza.
She is going to join idol groups such as The Possible and Tokyo Cheer2 Party under Victor Entertainment label.
- Source : Girls News