I was invited to the home of my senior from my university days. He is married to a wonderful wife and seems to be happy. We hadn't seen each other for a long time and it got late into the night while we were talking about old times. I ended up staying at his house, but in the middle of the night I witnessed my senior and his wife training him as a masochist. The next day, my senior left home for work and I was left alone with his wife...