I was invited to the home of a senior from my university days. She is married to a wonderful wife and seems happy. It's been a long time since I last saw my girlfriend again, and while we were talking about her memories, it got late at night, so I decided to stay at her senior's house, but in the middle of the night, she had sex with her senior and his wife's masochist. I witnessed the training. The next day, my senior left home for work and I was left alone with my wife...
