I was busy with work and missed the time to get married, but fortunately I married a beautiful and talented wife who is so good for me. His wife, Rieko, has remarried, but she and her stepdaughter Taka are still happy every day. One day, as usual, when I came home from work, the bed sheet I had just changed was dirty. I felt strangely uneasy, but I didn't realize that this was the beginning of my betrayal...