Six months into their marriage, young wife Nanako's life was once filled with happiness—until her husband Takashi fell seriously ill, drastically changing the atmosphere at home. While Takashi was hospitalized, concerned for Nanako's well-being, he asked his older brother Satoshi to help her out. However, despite being unemployed, Satoshi began spending more and more time with Nanako, eventually moving into her home. Though confused at first, Nanako gradually grows closer to Satoshi. Meanwhile, the property manager's son, Mitsuwo, has secretly fallen in love with her—and Nanako eventually responds to his feelings. But when the property manager discovers this, he uses it as an excuse to demand Nanako's body. With her husband away, men begin to pursue Nanako one after another. Before long, Nanako herself starts seeking pleasure.