22/7 (Nanabun no Nijyuuni)

One day, Miu Takigawa suddenly gets a letter telling her she has been chosen to join a brand-new project. Only half believing it, she goes to the place named in the letter. There, she finds seven other girls who were called the same way. The girls see a huge, top-secret facility. They stand there confused as they are told: "You are going to debut for a major record label as an idol group." A new kind of idol, never seen before, is about to be born here...