In their final year of middle school, the five members of the band CRYCHIC went through a painful breakup. Each of them carried their own regrets and went off to different high schools, trying to stay away from one another.
Anon Chihaya transfers into Haneoka Girls' Academy halfway through the year, where a lot of students play in bands as a hobby. Anon wants to be part of this trend and pictures herself as a vocalist. As she tries to put together band members, she becomes friends with Tomori Takamatsu, a quiet girl who seems interested but unsure about joining. Anon doesn't know that Tomori used to be in CRYCHIC and still has emotional wounds from that time.
Tomori introduces Anon to Taki Shiina and Soyo Nagasaki, who were also in CRYCHIC. Taki doesn't want to play music with Anon, but Soyo is encouraging and willing to help. With Soyo's support, Anon's dream of starting a band gets closer to coming true—if she can just find a couple more members.