During a training trip, my senior and I decided to have a drinking party in a female colleague's room at a hotel. We bought some alcohol and went to the room. While we were talking about trivial things like company complaints and love stories, my senior started seriously flirting with female colleague A-chan! Then, without any regard for us, he went to the other side of the sliding door. B-chan and I, who were left behind, started to get excited while watching the affair between A-chan and our senior...