First let me say that the acting is this show is great. Everyone does a phenomenal job in their respective parts. And the story is interesting.

But for me, this show was lacking, but I can't really explain why. I found myself being irritated at the flashbacks even though they were very necessary to the plot. There wasn't really enough of a romance between any of the characters to focus on that one way or another either. My favorite character was Yook Seung Jae's role, but I felt like more could have been done with it at times as well. I didn't really like the "other realm" stuff either...for me those parts were just annoying.

Overall, the drama is good and I think the parts that bugged me were more specific to me than anything else. I'm glad I binged it because if I had paused between episodes, I'm not sure I would have gone back to it very quickly.