Totsuko is a high school student with the ability to see the „colors“ of others. Colors of bliss, excitement, and calm, plus a color she values as her favorite. Kimi, a classmate at her school, gives the most beautiful color of all. Despite not playing an instrument, Totsuko forms a band with Kimi and Rui, a quiet music enthusiast she meets in a used bookshop in a remote corner of town. 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“?