In the year 2032, the legendary idol unit "7th Sisters" suddenly retired from the industry and disappeared. That was the end of the idol industry... until two years later, when a young glory-seeking employee is appointed to be the leader of Tokyo's next generation idol studio, "777 (Three Seven)," commonly referred to as Nanastar. However, the city continues to believe that idols are a thing of the past, and Nanastar is no exception. Their slump continues, but one day a mysterious and beautiful female manager approaches you and says, "If the idols of the past are gone, we'll just have to make new idols! True "sisters" linked by powerful bonds!" The story of the idols of the future, the Nanastar Sisters, will now unfold.
| Actor | Role |
|---|---|
 Minami ShinodaHaru Kasukabe (voice) | Haru Kasukabe (voice) |
 Yuuki TakadaMusubi Tendouji (voice) | Musubi Tendouji (voice) |
 Ai KakumaRona Tsunomori (voice) | Rona Tsunomori (voice) |
 Yui NakajimaHime Nonohara (voice) | Hime Nonohara (voice) |
 Shiori IzawaMomoka Serizawa (voice) | Momoka Serizawa (voice) |
 Ayaka ShimizuSumire Usuta (voice) | Sumire Usuta (voice) |
 Haruka MichiiSui Kamishiro (voice) | Sui Kamishiro (voice) |
 Asaka ImaiShizuka Kuonji (voice) | Shizuka Kuonji (voice) |
 Saori OnishiAlessandra Susu (voice) | Alessandra Susu (voice) |
 Sakura NakamuraHarumi Sawara (voice) | Harumi Sawara (voice) |
 Maika TakaiHarumi Kajika (voice) | Harumi Kajika (voice) |
 Yuuki KuwaharaHarumi Shinju (voice) | Harumi Shinju (voice) |
 Inori MinaseConey Rokusaki / Nicole Nanasaki (voice) | Coney Rokusaki / Nicole Nanasaki (voice) |
 Tomomichi NishimuraKozo Hakkaku (voice) | Kozo Hakkaku (voice) |
 Toshiyuki MorikawaNoriyuki Namekawa (voice) | Noriyuki Namekawa (voice) |