Mirena-san, a new employee who has been with the company for a few months. She absolutely trusts and wants to become a professional like her veteran supervisor, who is in charge of education. The two have a relationship like father and daughter, but to deepen their bond, a mixed bathing facility has been prepared. Once they take off their neatly dressed suits and become completely naked, the supervisor becomes a man, and the subordinate becomes a woman! "Which feels better, your wife's kiss or this?" Indiscriminately, they indulge in adultery during an outing, engaging in unprotected sex!