Ritsuka Uenoyama is bored with it all—with school, with his basketball club, and even with his one true passion: playing guitar. Until the day he finds his favorite hidden napping spot occupied by a strange boy cradling a broken-stringed guitar. At first, Uenoyama is nonplussed by Mafuyu Sato and his slightly odd behavior, but when, on a whim, he asks the other boy to sing, the power of Mafuyu's voice pierces him to the core.