Three years into our marriage, we were a picture-perfect couple, and our happy days changed one day. - My husband's best friend, Mr. Yoshida, came to Tokyo for work and ended up staying at our house for a week. - When I met him for the first time in a while, he was kinder, stronger, and more manly than my husband. - That day, when Ms. Yoshida accompanied me shopping on behalf of my husband who was busy with work, we suddenly became close. - Even though we are tormented by guilt, we cannot suppress our desires...