Kitauji High School Concert Band is preparing their parts for the ensemble, but some students are fooling around when they should be practicing.

The concert band receives their marching band uniforms and begins marching practice in preperation for SunFes. Things are different now, with the members all more engaged in practice. And SunFes day arrives.

The audition for the competition participants has come. Everyone must demonstrate their abilities, whether they're a third-year or a first-year. And then, the results are revealed.

The competition's coming up. Kumiko is suddenly asked to play a difficult phrase from a different part. She begins practicing, but...

Having won first place at the Kyoto competition, Kumiko and the band are preparing to compete in the Kansai competition. A shadow looms over them when an old member, Nozomi Kasaki, enters the picture.