When her useless husband, Osamu, a section chief for many years, hurts his back and is hospitalized, his wife, Shino, is left alone in her modest apartment. She is caught exhausted after masturbating to orgasm by Sagawa, who happens to have come by to borrow some detergent. In the heat of the moment, Sagawa pushes Shino down and thrusts his prized penis into her. It's been two years since she's tasted a thick cock... and every time it goes in and out, it feels like her pussy is being torn apart. This frustrated wife has awakened to the joys of womanhood...