if youre looking for something that twists your mind and everything makes sense at last this is a good choice. i enjoyed watching it but of course it's not perfect.. they could have ended it at the first part but i cant really complain about having another part i just know ill keep missing this kdrama years from now. To be honest at first i didnt get it the story starts at a point where the viewer doesnt understand the world building so it's a bit confusing, it took me 2 episodes to get the grasp of it.