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.

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.