Yes, everything; From every monster to human. From past life to present life. From every character and their personality.
What a wild ride it has been! But where to start? I've seen a lot of people saying it was a waste of time and didn't understand much of the story due to it being slow-paced but to each his own.
I definitely enjoyed a lot of this drama if you knock off some boring scenes, I loved the tense atmosphere between every character.
From the way monsters were portrayed and came back to present life, completely different. You can definitely place it as: In a world where everyone wears a mask, it's a privilege to see a soul. And that was definitely a case here. You wouldn't even expect for such pretty humans to have a hidden monster in them.
I genuinely liked Kwon Na Ra's performance here, I know a lot of people don't like damsel in distress type of girls in dramas nowadays but, it just proofs that even if you are weak, soft and kind, you can still be a badass by the end of the day.
Tears are no sign of weakness, they're just a proof you've been strong for too long. That was the case with Min Sang Un. She's quite a walking proof that you may not control all the events that happen to you, but you can decide not to be reduced by them.
Hwal was definitely a proof of how do you destroy a monster without becoming one?
I liked it, even with some boring scenes here and there, especially since we don't get a lot of fantasy dramas based on this.
Someone could call themselves a hero and still walk around killing thousands of people. Someone else could be labeled a villain for trying to stop them. Plenty of humans were monstrous and plety of monsters knew how to play at being human.