Ritsuka Uenoyam, a high school student who loves playing guitar, is shocked when he hears Mafuyu Sato’s singing voice. Thus, he invites Mafuyu to join him and his bandmates, Haruki Nakayama and Akihiko Kaji, and debut as the band “GIVEN”. After achieving success in the first performance, Ritsuka realizes his feelings and becomes a couple with Mafuyu. During the summer holiday, GIVEN makes a great effort to get a chance to perform on a bigger stage, but Mafuyu feels stuck in composing. At the same time, Ritsuka has a conflict with Mafuyu for a small reason...