Kokone Mizutani, a widow with big breasts who turns into a sex slave in a circle by an old worker - Shinon Mizutani (Rio Fujisaki)

The movie revolves around Kokone Mizutani, a widow who becomes a sex slave in a circle by an old worker named Shinon Mizutani. The relationship between the two main participants is one of exploitation and control, with Shinon exerting power over Kokone. The central dramatic tension lies in the unequal dynamic between them, with Kokone being forced into a situation she may not have consented to.