I reconnected with a senior from my student days and was invited to his home. He seemed to be happily married. I was told to drink as much as I wanted and ended up staying the night. Late at night, while looking for the toilet, I witnessed my senior giving his wife masochistic training. The next morning, when I woke up, my senior had gone out, and his wife, now alone with me, started to seduce me with an unusually close distance. But it was all part of the perverted couple's scheme.