Five years ago, Yumi married Kuroda - her colleague. She decided to quit her job to stay at home to take care of her family, as well as planning to have a child with her husband. But her husband was infertile, despite trying hard, there were no results. During this time, there was an incident at her father's factory in the countryside, not wanting her husband to be involved, she decided to return to work to earn money to pay off her father's debt. Knowing this, the director made an offer, she would be his lover for one month under the guise of a secretary. In return, he would pay off her family's debt and help solve the factory's problems. With no other choice, Yumi agreed. And from then on, she became the director's secretary and lover, he would have sex with her whenever he wanted, in the director's office when her husband was right outside, in a hotel, in her house while her husband was sleeping next to her... Every time, he would ejaculate inside Yumi as if trying to impregnate her for her infertile husband. On the last day, he called her husband and turned on the speaker, letting her husband hear their entire affair, causing her family to fall apart, and then he would have her forever...