Well I can't really tell much about the manga itself as I only have it on my plan to read list, but it seems interesting...well a romance manga as any other(but I might be mistaken):
The story of the manga centers on Tsubasa, a girl who saw an inspirational brass band performance at the finals of the Japanese high school baseball championships one summer. Tsubasa vows to join the band when she enters high school, and she happens to meet a certain boy there.