It's been five years since I married my co-worker , Sei. I'm about to be promoted, and my relationship with my wife is going well. I even went to help my boss, Ozawa-san, who was very kind to me, move today. A few days after the move, Ozawa-san confessed to me that he was having an affair with a married woman. I laughed, thinking it was just a joke, but he said he'd show me the proof. When I headed to the designated Japanese-style room, it turned out to be a one-way mirror, and Sei, who was supposed to have gone out, came to the room on the other side...