Married woman "Yukari" visits her son's dormitory for a tour, where she meets the alluring dorm matron "Natsuko." Skillfully manipulating her with words, Natsuko lures Yukari into another room and suddenly changes her demeanor, taking complete control. Initially submissive, Yukari gradually awakens to the pleasures of lesbian intimacy through Natsuko's training. As the sessions progress, she begins actively seeking out the relationship, ultimately undergoing a complete transformation.