In our third year of marriage, we were the picture-perfect couple, but one day, our happy days changed completely. My husband's best friend, Yoshida-san, came to Tokyo for work and stayed at our house for a week. Meeting him for the first time in a long time, he was kinder, stronger, and more manly than my husband. That day, when Yoshida-san accompanied me on my shopping trip in place of my husband who was busy with work, we suddenly became close. Although we were tormented by guilt, we couldn't suppress our desires...