A lot of my friends told me that this was a good drama, but I was unprepared for its sheer awesomeness! I just recently finished School 2013 (which I enjoyed) and even though Lee Jong Suk wasn't the main focus of that drama, he caught my attention enough that I was curious and wanted to see his other dramas. And I am so glad I chose to watch this one. The story was really riveting, even from the very first episode, it grabs your attention and sets everything up nicely. You always might think you know how the story will unfold but there are always nice twists that are unexpected. Literally there were a couple of moments where I was genuinely shocked or surprised because I had no idea of the outcome of certain situations. It was really intriguing. Another aspect of the story which was welcome was the way the conflicts between characters were set up. Everyone is interconnected and had history which gave relevance to their problems with each other. None of that "I'm the b****y girl so I'm gonna be mean now for no reason other than thats my stereotype." OR "Oh I'm the hot male lead so let me be perfect and wonderful with no vices, why? because I'm the male lead." The acting was phenomenal. Not only the two leads but also the supporting cast as well was perfect. All the characters go through subtle personality changes throughout the story, and each actor portrayed this perfectly. Nothing was rushed, nothing felt off, the transitions were all very natural and fluid. The music was also spot on. Weirdly enough they only had a handful of songs for both OST and background music and kept these same songs throughout the entire drama. However they were never boring or overplayed. They all had an emotive quality that contributed to the feeling of the moment, and the timing when they were played was great. Overall this was a OUTSTANDING drama, probably the highest ranking review I've ever given (and I hardly give 10s). Really it was SOO good, lots of intense moments, lots of adorable, make you squeal like a 5 year old girl moments. I would definitely recommend this drama to ANYONE. In fact I think EVERY SINGLE KDRAMA LOVER MUST WATCH IT!