Totsuko is a high-school student who attends a Christian Academy in Nagasaki and can see the hearts of people as colors. Whether they’re happy colors, sad colors, peaceful colors, frightened colors... In order to not darken her friend's and family's “colors,” Totsuko is careful to read the room and stretches the truth to keep them all brightly colored. Totsuko then meets a beautiful girl who radiates very striking colors and a boy who loves music in a used bookstore in the corner of town. The three come together and form a band to make the music of their adolescence. (Source: Crunchyroll, edited)