Uta Komaki is a first-year high school student. There are many things she's not good at, but what she enjoys most is singing. Aiming to have a normal teenage life, she attempts to join the light music club when she starts high school, but her timid nature causes her to fail miserably. In her despair, Uta discovers acappella music. Through acapella, she meets other girls who can only connect through their overlapping singing voices.