Miu Takigawa receives a suspicious letter from talent agency, G.I.P. Eight young girls including Miu are brought together by the hands of fate. The letter says, “You will be joining an idol group and debuting on a major label.” A man named Aida takes them to a top-secret underground facility with a mysterious “wall.” Miu and the girls experience a whirlwind of light and darkness as they make their way to the stage…

The Wall suddenly issues an order stating that, “The leader of the group is Reika Sato.” Having a strong sense of responsibility, Reika worries about her newly appointed position. The Wall issues another order instructing 22/7 to fly to Okinawa to shoot images for a photo book.