Yuichi, whose sales performance is not good, returns to his parents' house and tries to sell used cars, but he is ignored and blatantly mocked by his younger brother. His younger brother's wife, Eriko, takes kindly to her brother-in-law. Her brother-in-law rapes her out of frustration, and Eriko resists his violent actions, but before she knows it, she accepts him... On a tropical night, sweat and bodily fluids mix together in an intense love affair!!!