After a petty argument drives Takashi's wife out of the house, her older sister Shiori comes to help settle their huge marital fight. Deeply grateful, Takashi blurts out that he will do anything to repay her. Shiori answers, "If you mean anything, then hold me." He never imagined she would ask for his body. Faced with her snow-white skin and glossy, beautiful breasts, he initially runs away, but he cannot bring himself to break his promise.