My wife is not the type to cheat on me. I'm on a morning commuter train, bouncing around. As I'm tired of the bleak interior of the train, I look at the in-flight advertisement hanging from the ceiling, and a certain topic catches my eye. "20% of full-time housewives are sexually interested in male visitors during the day!" For some reason, I was intrigued by this sentence. My wife, who has a laid-back and calm personality, is often called beautiful, and when she wears tight-fitting clothes, her figure is so good that I don't know where to look. However, it seems that she has no interest in any other man than me. But for some reason, my wife's cell phone is always locked.