The young girl brought her boyfriend to meet her older sister, but little did they know that this would be the opportunity for the boy to have an affair with his future sister-in-law. The young man was always shy and reserved when talking, even when his sister-in-law 'made advances' towards him, he still seemed worried and fearful. However, in the end, the young man was incredibly lucky to be with both the beautiful sister-in-law and the cute girlfriend, as both were very skilled in bed. I wonder what will happen to the story of these three when he gets married?