Machiko Aoki

昭和11年。料亭の女中定は店の主人に心惹かれ、情事を重ねるようになる。その情事が男の妻に知れてしまい、二人は駆け落ちを決行する。快楽におぼれる日々を重ねるうちに定は男を永遠に手放したくないと思うようになり、ついには男を自分だけのものにするため首を絞めて殺害し、さらには男の陰部を切り取ってしまうのだった。

"Jealous" man-killer Mayumi (Hitomi Kozue) is sent back into solitary confinement after being re-arrested for the murder of the doctor who fingered her for a botched surgery. After emerging from solitary confinement to find an all-new gang of bullies picking on a meek, young female prisoner, Mayumi is now a much harder soul who takes no attitude from anyone, and she turns savage when the poor girl is enslaved by Yakuza.

Roman Porno from 1975.

When a group of young women is thrown into juvenile hall, they will soon realize how bad their lives are about to become.