Shei Ba Shei Dang Zhen

One is a carefree playboy who loves to play games, the other is cool and experienced and won't let emotions get over his head. A relationship that began as a fun fling became a contest of psychological warfare. Even as they probed and tested each other, pushing the bottom line, they started to sink real feelings into the relationship. In the end, they found themselves more and more caught up with each other. Who was taking it seriously, and who was just playing? (Source: Kuaikan, translated)