You don't have to shine to have youth. First-year high school student Uta Komaki loves to sing, but she's extremely shy, timid, and a bit of a coward. She wants to join the light music club for her high school debut, but she's too intimidated by the dazzling presence of the members to submit her application. In her moment of despair, she receives an invitation to join the a cappella club from the president, Airi Kojo...