Chisato Nakajima and her husband Hideo became a couple four years ago. Chisato was remarried, while Hideo was marrying for the first time. Initially, they lived with Hideo's father, but he passed away last year, so now the two live alone. Chisato wants to have a child with Hideo, and Hideo himself is quite fond of that aspect, so they engage in marital relations every morning and every night. Their relationship was smooth and harmonious, but one day, Hideo invited a man named Minegishi into their home. Minegishi Saburo... he was Chisato's previous husband.
