Plot Summary

My friend from my school days, Oki, started a business. My wife and I were invited to the anniversary party, and I was in high spirits after drinking with my wife for the first time in a while. When the party ended and we were about to head to the after-party, my wife seemed to be quite drunk, and the next thing I knew, Oki was driving her back to the hotel room. At the time, I had no suspicions... A few days later, I received a DVD from Oki, and when I casually played it, I saw a scene that drove me crazy...