Totsuko is a high school student who can see the “colors” of others. The colors of bliss, excitement, and peace, as well as the color he considers his favorite. Kimi, a friend from his school, stands out as the most beautiful color. Although she doesn’t play an instrument, Totsuko forms a band with Kimi and Rui, peaceful music enthusiasts she meets in an antique corner of the city. While they practice in an old church on a remote island, music brings them closer, forges friendships, and sparks feelings. Will they discover their true “colors”?