Chika Takami is an ordinary girl who wants to form a School Idol Club to be a school idol. She meets potential members, but how will she get them to join?

On her mission to form a School Idol Club, Chika Takami searches for more members and someone who can help compose their songs.

We meet Mari Ohara, who makes a deal with Chika and the others. If they can fill the school gym during their first performance, she'll approve their club despite their numbers. Will they be able to gather enough people?

Chika wants the first years Hanamaru and Ruby to join the School Idol Club, but they are both hesitant. We learn about the two and what their true feelings are toward school idols.

After finding out their school is at risk of closing due to low enrollment, the girls of Aqours decide to take action and find a way to promote the town and the school they love.