In order to repay the debts of her beloved husband, Mariko requests a loan from her former classmate Anzai who has become a successful entrepreneur. In return, she agrees to live with him for three months. She learns of his loneliness, and her attraction to him grows.

Natsumi married Renji, a passionate teacher at the school where she did her practical training. By chance, she encounters one of Renji's students, Soichi, who accuses her of hating Renji. When Soichi tries to threaten her with violence, Natsumi advises him to prove himself through his studies, and from that day on, she becomes his private tutor. Soichi's imagination runs wild as he is captivated by the alluring Natsumi. Their study session begins, and things take an unexpected turn...