A young woman, an experienced gambler, enters a nunnery to atone for some of her father's crimes. When the nunnery runs into debt, she resorts to gambling and challenges the racketeer threatening to sell the place to a game.

Drama is afoot at Shirobara Middle School when the bold Henmi Ryoko transfers into Class A, 9th Grade. She immediately picks a fight with, Masuda, the head of the preparation committee. The girls' battle for control of the gang soon grows out of control as it sweeps up the entire school. Brawls. Seduction. Yakuza. And more!

Sex games by students at a junior high school are exposed by the principal and teachers, but the tables are turned in favor of the students.