Nino Arisugawa loves to sing. As a child, she met two boys that changed her life: Momo and Yuzu. One broke her heart while the other one mended it. Making a promise with each one of them, they all part their separate ways, but Nino commits to singing every day. She hopes that one day her songs will reach them. Her first year of high school starts, and so does her reunion with childhood friends who would rather forget than remember their time together.