Ritsuka Uenoyama was losing interest in his favorite hobbies, playing guitar and basketball, until fate decided to intervene. He meets Mafuyu Sato, an apprehensive and shy student in need of a friend. The two grow closer with time, especially after Mafuyu sings with him for the first time. Determined, Ritsuka works to make Mafuyu the lead singer of his band before their first music festival.