movie plot : swing girls

The movie's locale is a high school in a remote corner of Tohoku.
Girls in the high school who gave up their summer vacation to take a class
made a jazzband not to take a class.( to bunk it.)
Of course they won't practice and will bunk it.But when they can make a sound a little by little,they are into jazz. After all they decide to make a jazz band by themselves although they don't have instruments. At first they tyied part-time job and failed it.
They get rid of having no instruments,having no area for practice,
at last they almost break up thier jazz band.
But their feeling to jazz mixed young power and they can make the excitement.