In Tokyo's Chiyoda-ku is the traditional school Otonokizaka High. Second year student Kosaka Honoka discovers the school will be closed in three years. In order to avoid being closed, the school must increase its number of prospective students.

Honoka and friends form a school idol group to entice more students to attend. When pointed out their group could have the opposite of their desired effect, Honoka becomes dispirited.

Honoka's group idol name is "µ's" and the group debuts their first song. Their popularity grows at school, and they have their first concert.

µ's is now at 6 members with the addition of Hanayo, Rin, and Maki. The group attempts to make their idol group into a proper school club. However, they are informed another idol club exists, and must negotiate with them.

The school is threatened to be closed. In order to protect Otonokizaka High, Eli looks for ways to make the open campus a success. When trying to help the group's success, Umi tries to get Eli to teach them how to dance.

µ's grows to nine members with the addition of Eli and Nozomi. The group's School Idol ranking is rising to 50th, but they must reach 20th place to participate in Love Live! They must take drastic measures to reach their goal.

It is a new semester and the group is ranked 19th, which is high enough to be considered for Love Live! µ's next event is at the school festival, but they are forced to perform on the roof.

Honoka quits being a School Idol after she failed to realize Kotori was suffering. µ's goes on hiatus, and Honoka is left without a goal. Honoka arranges for Umi to meet her, and tells her how she really feels.

Having avoided the closure of Otonokizaka High, the members of μ’s return to their everyday lives. News of a second Love Live reaches the girls. This time teams that win their regional preliminaries move onto the finals.

Once again μ's begins pursuing the Love Live. Just as they're getting started, a new rule is announced declaring only previously unperformed songs can be sung at the regional preliminaries. In order to write a new song in just under a month, the girls head to the mountains on a camping trip! Naturally, they stay at Maki's cabin.

The Love Live regional preliminaries are just before the girls. Because the group is free to choose any location for their performance, Honoka suggests they perform at school, but Nico and Hanayo insist they cannot win unless they choose a location with greater impact.

μ's is invited to perform as a guest at the Akihabara Halloween event. They need local support to win the Love Live. By putting on a impressive performance, μ's hopes to close the gap between themselves and A-RISE before the final preliminaries.

A physical examination reveals Honoka has gained weight. Umi scolds her for her carelessness, and when she attempts to put on the outfit from the first concert...

When μ’s has trouble agreeing on a song for the final preliminaries, Nozomi suggests writing a love song. The members are shaken by the idea of performing and unfamiliar genre, but Eli is suprisingly supportive.

The day of the final preliminaries, the second years try to make their way to the event after giving an address from the student council at the school's information session, but their means of transportation are paralyzed due to the snow. The girls try walking through the snow to reach the event, but...

Today is graduation. Having finally finished her farewell address, Honoka heads to school in high spirits. At the gates she meets Rin and her friends. They head to the club room together, where they find a trophy and flag.