One evening, Yui's husband brought Managing Director Kitayama home. Yui welcomed the important guest and busily attended to him with drinks and snacks. "Come to think of it, Hatano's wife has a teaching license, doesn't she?" Managing Director Kitayama brought up, and proposed, "Could you tutor my son?" Yui left the decision to her husband, who agreed, saying, "Why not? If it helps the managing director's precious son improve his grades." Starting the following week, Yui began going to her boss's home as a tutor.