They've been married for five years now, but they've been happy, but they both felt a rut even without saying anything. One day, while talking to her colleague Kawaguchi, she talked about a woman and boasted that a married woman who has been married for three or five years is the easiest to get married. As I believe in Reiko, I replied that this would never happen, but combined with my rutty married life, I was forced to take Kawaguchi's mouth. A few days later, Kawaguchi and his wife, whom they invited to their home, were forced to rationalize them and left them alone for three hours...