During the sixth anniversary celebration of the Tokyo 7th Sisters smartphone game on Wednesday, an announcement video revealed that the game is getting a 70-minute anime adaptation by Toei Animation in summer 2020. The production will receive a limited amount of screenings in theaters.
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 (Source: Tokyo 7th Sisters Wiki).
Tokyo 7th Sisters is a fully-voiced idol raising and rhythm game developed by Donuts for iOS in February 2014 and Android in November 2014. Since its release, the game has amassed over 1 million members. A comic anthology of the story was published in July 2015, and several short animated music videos have been produced. It was also announced during the sixth anniversary celebration that the game's "Episode" series conclusion, titled "Episode 6.0," is in development.