Totsuko is a high school student with the ability to see the “colors” of others. Colors of happiness, emotion, and tranquility, as well as a color she cherishes as her favorite. Kimi, a classmate at her school, emits the most beautiful color of all. Although she doesn’t play any instruments, Totsuko forms a band with Kimi and Rui, a quiet music enthusiast whom she meets at a bookstore run from a remote corner of the city. While practicing in an old church on a remote island, music brings them together, forming friendships and sparking affection. Will they discover their true “colors”?