This facility is the only one in Japan that treats pri***ers with ejaculation addiction.

The inmates are those whose excessive sexual desires have disrupted their daily lives.

This is a three-year record of the beautiful female pri*** guard O, who works there, from her rookie days to the present.

"I myself will provide sexual services for the inmates," she says, with a professional attitude that never reveals her emotions while on duty.

With pri***ers who cannot control their impulsive sexual desires, the female guard coldly and condescendingly performs cowgirl sex as a matter of business, and even when the pri***ers make them cum as they please, such as by having sex with them spontaneously, thrusting, or fingering them, the guard never changes her expression.

Even when she climaxes, she doesn't show it on her face.

Instead of making a sound when she feels pleasure, she blows the whistle.