Totsuko is a high school student with the ability to see the 'colors' of others. Colors of bliss, emotion, and tranquility, plus one color she cherishes as her favorite. Kimi, a classmate at her school, gives the most beautiful color of all. Although she doesn't play an instrument, Totsuko forms a band with Kimi and Rui, a quiet music enthusiast whom she meets in a second-hand bookstore in a remote corner of the city. While practicing at an old church on a remote island, music brings them together, forming friendships and sparking affection. Will they discover their true 'colors'?