A woman living in Hachioji City, Tokyo, works daily at a mobile phone leasing company. Though she has no children, accumulated stress from work and marital discord has taken its toll. One day, she begins an affair with a client. As her relationship with her husband grows strained, she impulsively seeks other men. She becomes unable to resist the urge to confess her betrayal to her husband, yet to maintain appearances, she keeps more secrets from him. Unable to end her marriage, she surrenders increasingly to selfish desires. Finally, she resolves to pursue lewd pleasures during a trip. Ryoko chooses to follow her desires without blaming herself.