I'm Keita, 38 years old, working as a company employee in a rural town in northern Kanto. My wife Reiko is 42, and we've been married for 15 years. One day, I saw my wife having sex with another man at the neighborhood association hall—no, not just one, but another man too, younger than me and physically stronger. In that instant, my heart felt like it was shattering. Why? Why was my wife doing this? I couldn't understand it at all. That day's events became the turning point that would drastically shake our lives.