这部作品是一部从池底开始的青春群体剧。故事发生在高二暑假，心和美九在体育老师山本的特别指导下开始清理泳池，并协助清理飞进来的沙子。随着工作逐渐展开，游泳部的同学

　　A film adaptation of a play made by a high school drama club, directed by Yama