Honoka Kousaka is heartbroken. Her school, Otonokizaka High, will be forced to shut down unless it can find more prospective students. Luckily, Honoka and her friends have a plan: they'll form an idol group and throw concerts to attract others to join the school! But following through won't be easy � they'll need to find talent, make outfits, find practice space, build stamina and more in hopes of keeping Otonokizaka High alive!