Totsuko is a high school student with the ability to see the 'colors' of others. Colors of bliss, excitement, and serenity, plus a color she treasures as her favorite. Kimi, a classmate at her school, gives off 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 they meet at a used bookstore in a far corner of town. As they practice at an old church on a remote island, music brings them together, forming friendships and stirring affections. Will they discover their true 'colors'?
High school girl Totsuko can see the colors of the emotions in people. In order to keep her friends and family from feeling dark feelings, she worries, reads situations, and even lies to smooth thing over. At an antique bookshop in the corner of Nagasaki, she meets a beautiful woman with an incredibly beautiful color and a music-loving boy trying to put together a band. The story follows these three sensitive people who gather together to play in a band.