I like the concept and the fight scenes. Story was progressing good. And what I love the most is the main couple, I love their chemistry, the cold guy and a girl with attitude. Both of them are smart and they really look good together. However the story is good and they build the tension, but has an unsatisfying resolution. They suffered for 19 episodes and the villain didn't even got a deserving punishment, he didn't repent or anything. A lot of character died but nothing got resolved. No explanation about the ending why is it like that? And what it is that they discovered? Is he still alive? Whats gonna happen next? It should be open ending I guess but it doesn't make any sense. 19 episodes is good I really love the scenes but the ending was not, it ruined everything.