Krystal was there so I needed to watch it. And she did good, although her character was a little weird. Main leads - Jang Ki Yong' and Chae Soo Bin's characters were annoying and well they are not really good partners. Storyline is really realistic and the plot twist proves it and it is a big advantage. I could not rate it higher only because it was a little boring, despite the fact how much I liked Krystal's scenes.