Myungsoo and Krystal were in a realtionship for 3 years until on there anniversary Myungsoo brought in a girl and Krystal kindly let them in and the girl cam in with Myungsoo ask for his room and Krystal told her that it upstairs and when Krystal was about to come wipe Myungsoo but she had already noise from the room and when she open it she couldn't  believe that Myungsoo was doing th