Shouyo was diligently working as a servant in a respectable household when one day she suddenly became entangled in her master's disturbing fetish. Though fearful of the situation, she tries to endure with her innocent heart. However, the men, perceiving her purity, begin inflicting cruel acts upon her body. A vibrator is pressed against her nipples, and its merciless stimulation gradually takes control of her mind. As her masochistic desires slowly begin to awaken, the men take pleasure in watching her transformation.