I was so busy with work that I missed my chance to get married, but fortunately I was able to marry a beautiful and good-looking wife who was too good for me. My wife Rieko was remarried, but I was living happily with her and her son Taka-kun... Then, one day, I came home from work as usual and found the sheets I had just changed dirty. I felt a strange uneasiness, but I didn't realize that this was the beginning of a betrayal...