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.

Otonokizaka High School has been saved! Despite having to withdraw from the Love Live!, the efforts of μ's were able to garner enough interest in their school to prevent it from being shut down. What more, following the conclusion of the first, a second Love Live! is announced, this time on an even larger stage than before. Given a chance for redemption, the nine girls come together once more to sing their hearts out and claim victory. However, with the end of the school year approaching, the graduation of the third years draws near. As they attempt to reach the top of the Love Live!, they must also consider their future and choose what path the group will take. Though the question of whether to continue without the third years or disband weighs heavily on the minds of its members, μ's must quickly come to an answer with graduation right around the corner.