Influenced by her high school teacher Harada, 23-year-old Miyoko Terajima (Yoshiko Ayase) vowed to be a good teacher to be loved by her students. But the road was full of ups and downs, and an accident made her lose the trust of her students. In the end, Mei Xiangzi transferred to Hudao No. 3 Middle School and decided to start all over again. At the beginning of taking office, Mei Xiangzi was arranged by the school to serve concurrently as the coach of the men's volleyball department. The boys' volleyball department of the school is in vain. The boys here have never touched the volleyball and only think about some bad things every day, so they are called "stupid department" by the girls. The unknown Mei Xiangzi made a promise to the boys that as long as they played well, the teacher would agree to whatever they asked for. The boys who coveted Mei Xiangzi's figure have long made an excessive request, that is, if they win the competition, the teacher will show them their breasts. The bewildered Mei Xiangzi agreed to this ridiculous request, and the boys began to make unremitting efforts to win.