My wife "Sayuri" and my wife's best friend "Yuko" have been close friends since ○ school days, and sometimes I was drinking at Yuko's house like a girls' association. The conversation is always fixed and each other's . One day, Sayuri happens to meet her best friend's husband, Toru, on the side of the road. Without needing a reason to put their bodies on frustrated men and women, they were absorbed in the abnormal world that they could not experience in married life. However, the relationship between the two is exposed, and the freezes in an instant...