The Unpleasant Truth... My Wife is Actually Extremely Promiscuous (Natsuko Mishima, Mako Ayanami, CSBE-008)

One day, while I was drinking and partying with friends, I overheard them joking about my wife. I initially thought she would just take it as a joke, but lately I haven't been able to reach her by phone, which made me suspicious. So I asked someone to investigate... and the harsh truth is, my wife really is having an affair...