This was too dark and too graphic for me that I have to take pauses between some of the more intense scenes. Having said that, I'm still giving this a 5 star for the following reasons: 1] overall, just excellent work and quite unique from the other kdramas I've watched; 2] the acting of ALL of the actors are, to my mind, worthy of an acting award. In fact, I'm betting on Song Hye-Kyo bagging a Best Actress award. The other main and supporting actors also deserve their acting awards. Collectively, the acting excellence is showing in small gestures, small changes in facial expressions and emotions as shown in their eyes; 3] script and directing - unique story and the artistry is there from beginning to end. Throughout the years I've watched kdramas, this one is definitely at the top quality-wise.