Mai met her husband when she was a student, and her only other man has been her husband. One day, her husband's boss, Sagawa, comes to her house, saying that she is tired, and gives her a massage. As he touches her neck, legs, and so on, she feels something hot on her body. A few days later, Sagawa comes back and touches her body, telling her that Mai is sexually frustrated, and teases her until she is on the verge of orgasm, when suddenly he stops and leaves. Mai is teased by Sagawa, and gradually begins to crave his cock herself. But Sagawa keeps teasing her to the limit...