At the beginning of the new school year, Sakuragaoka High School’s light music club was unable to reach the minimum number of four club members because all the original club members graduated and left school. The only new members of the light music club are Mio Akiyama and Ritsu Tiani.

The gentle and lovely daughter Kotobuki joins the company because she finds the interaction between Ritsu Tai and Mio Akiyama interesting; Yui Hirasawa misunderstands "Qing Yin" as " Relaxing music”.

As a result, there was bassist Mio Akiyama, guitarist Yui Hirasawa, drummer Ritsu Taai, and keyboardist Kobuki?. Later, new member Azusa Nakano joined the light section and became the second guitarist.