在日本的一个小村庄里面，暑假还要去补课的女孩们为了逃避数学课，主动负责给本校的棒球演奏的管乐队送饭。他们送过去的便当因为天气炎热很快就变质了，但是队员们在不知情的情况下，还是吃了那些盒饭感觉身体不舒服，但是马上就要演奏的情况下，唯一没有吃便当的中村带着这些女生练习奏乐。这些女学生们都没有学习乐器的经验，但是知道认错的他们还是硬着头皮学了下来。渐渐地，这些女孩们爱上了爵士乐，爱上了乐器带给自己的快乐。女孩们不但用心的努力的联系，并且还能不断创新，从四处汲取创作的灵感，由此一个由乡间女高中生创办的爵士乐队诞生了。女孩们用好多元素加入了爵士乐，拍棉被的声音，打乒乓球的声音等，都被他们吸收到自己那青春活力的爵士乐中。

In a small village in Japan, girls who have to go to make up classes during the summer vacation take the initiative to play the wind band for the school’s baseball in order to avoid math classes Deliver meals. The bento they sent over quickly deteriorated due to the hot weather, but the team members still felt unwell after eating those boxed lunches without knowing it, but when the performance was about to be performed, the only Nakamura belt who did not eat the bento Practice playing music with these girls. None of these female students had any experience in learning musical instruments, but knowing that they had made a mistake, they still bit the bullet and learned it. Gradually, these girls fell in love with jazz and the happiness brought by musical instruments. The girls not only worked hard to connect, but also kept innovating, drawing inspiration from everywhere, thus a jazz band founded by rural high school girls was born. The girls added many elements to the jazz, such as the sound of beating quilts, playing table tennis, etc., which were all absorbed by them into their youthful and energetic jazz