After three years of marriage, the happy days of a couple who are good friends like in a picture changed completely. Her husband's best friend, Mr. Yoshida, came to Tokyo for work and decided to stay at our house for a week. I met him for the first time in a long time, and he was kinder, stronger and more masculine than his husband. On that day when Mr. Yoshida accompanied me shopping in place of my husband who was busy with work, we suddenly became close. Even though we are tormented by guilt, we cannot suppress our desires.