You and Xiao are in a relationship for 2,5 years. But lately he started acting strange, coming home late at night. When you ask him about it Xiao always made an excuse and go to his room. Christmas Eve is coming soon. You and Xiao promise that you guys will watch the fireworks together. It was already 23:30am, and he didn't go to the spot where you waited. After waiting a little more, you decided to go home. Arriving home, you were horrified to see Xiao making out with his ex on the couch.