As the world moves on from the war and technological advances bring changes to her life, Violet still hopes to see her lost commanding officer again.

Kumiko is now a second year and one of the senior players of the euphonium section. With new underclassmen joining the concert band, Kumiko will have to learn new things…

In their last year of high school, two girls in the brass band club perform a song inspired by a fairy tale that parallels their friendship.