故事发生在位于东京都的音乃木坂学院中，经济不景气，人口老龄化等等的社会问题让这所学校的招生成为了难题。找不到学生，学校只能关门大吉，就在这时，九名少女站了出来。这些对学校感情极深的少女们决定，要为了保护学校不被废校而做出努力。

活泼健气的高坂穗乃果（新田惠海 配音），温文尔雅的园田海未（三森铃子 配音），温柔勇敢的南小鸟（内田彩 配音），聪明伶俐的混血儿绚濑绘里（南条爱乃 配音），我行我素的学生会长东条希（楠田亚衣奈 配音），傲娇大小姐西木野真姬 （堀絵梨子 配音），运动系少女星空凛（饭田里穂 配音），默默无闻的小泉花阳（久保由利香 配音），OTAKU宅女矢泽妮可（德井青空 配音），这些勇敢的少女组成了偶像团体，发誓要为了保护学校不被废校而做出绝对的努力。

Otonokizaka High School is in a crisis! With the number of enrolling students dropping lower and lower every year, the school is set to shut down after its current first years graduate. However, second year Honoka Kousaka refuses to let it go without a fight. Searching for a solution, she comes across popular school idol group A-RISE and sets out to create a school idol group of her own. With the help of her childhood friends, Honoka forms μ's to boost awareness and popularity of her school.

Unfortunately, student council president vehemently opposes the establishment of a school idol group. Moreover, Honoka and her friends have trouble attracting any additional members. But the Love Live, a competition to determine the best and most beloved school idol groups in Japan, can help them gain the attention they desperately need. With the contest fast approaching, Honoka must act quickly to try and bring together a school idol group and win the Love Live.

Kisah Honoka dan kawan-kawan menjadi idol untuk meningkatkan popularitas sekolah yang ingin ditutup dimiulai

廃校の危機に瀕した学校を守るために、私たちにできること。それは、アイドルになって学校を宣伝し、入学者を増やすこと！ 9人の少女たちが紡ぐ青春学園ドラマ、スタート！