Will give this drama a 10 if only the plot wasn't dragged too much from the halfway of the drama. I really enjoy watching the first 20 episodes of this drama. Epic. Very addicting, just want to watch another then another episodes..... until episode 20. Starting ep 21-37.5 though, I think the story lost its essential story and more focused at the romance between the leads (actually, imo this is the problem with most c-dramas). For me, it became super draggy, and I skipped and fast forward a lot. The plot became interesting again at halfway ep 37, until the series ended at ep 40. These 3 last episodes are worth waiting.

Superb acting. The chemistry between the lead couple is very good. Love the ost so much, esp the ending/closing song.