Introducing part

In high school, there is a girl and her friends who like to play musical instruments as a hobby. One day, they decide to form a group or band. Ryujin is the leader and the centerpiece; she sings and plays the guitar, while Winter is the guitarist, and Yuna is the drummer and yujin the sub singer and plays bass guitar lastly Son Chaeyoung the pianist. When Ryujin's group enters the school, they meet another group of girls who are stunningly beautiful.