第 1 集: 高坂穗乃果為了拯救音乃木坂學院免於廢校，決定成立校園偶像團體。

Otonokizaka Academy is announced to be closing down after everyone graduates due to lack of applicants, which comes as a shock to second year student Honoka Kōsaka, who loves the school. As she and her classmates Umi Sonoda and Kotori Minami try to think of a way to make the school more attractive to prospective students, Honoka is surprised that her younger sister Yukiho wants to go to a different school, UTX, instead of Otonokizaka. As Honoka decides to investigate UTX, she finds it attracts a lot of students due to a school idol group known as A-Rise. Honoka decides that the best way to save her school is to start an idol group themselves, although Umi isn't keen on the idea. As Honoka becomes downhearted, she spots a talented singer and pianist and redoubles her efforts, while Umi inevitably gives in and joins Kotori in partaking in Honoka's idea. Despite their request to start an idol club being rejected by the student council president, Eli Ayase, Honoka remains determined to make it work. (Source: Wikipedia)

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