Yuka, who works as a managing director at her husband's company, is in charge of accounting and training new employees. The company is stable, but the relationship between the couple is that of mere roommates and business associates. At that time, a fine young man named Zuo Ci joins the company as a new graduate. While training Zuo Ci, who is obedient and quick to absorb, Yuka secretly becomes aroused. One day, when Yuka has to go on a business trip in place of her husband, she seizes the opportunity to order Zuo Ci to accompany her, saying that it will be a good learning experience for her. But her goal is not just to train him. To comfort her aching pussy, and to satisfy her own desires...