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Shy Natsu awakens as part of a group chosen to ensure the survival of humanity. Together, they have to survive on a changed Earth.
The story is set in Tonakishima, a small island with a population of 600. Hana, a high school girl who lives on the island, loves recitals, and holds regular reading sessions for the island's children. Mizuki, the president of the Broadcasting Club, senses Hana's power to attract people through her reading and invites her to join the club. Hana joins the Broadcasting Club and experiences many firsts with the other members.
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.
A female documentary writer approaches the case of a hikikomori boy's murder of a young girl and a high school girl's classmate.
