Office worker Aihara spends his free time playing in a concert band while quietly carrying feelings for Hayama, the classmate who was his first love in high school. When Hayama unexpectedly joins the same band years later, old memories become part of Aihara’s present again. Rehearsals and music give the two men a reason to reconnect, forcing Aihara to decide whether a love he never moved past can become something real now.