Story-wise, it's actually good in the first half, but the rest, just boring. Also some plot holes, duh. Apart from being 'plastic surgery is the key', the fundament idea of the story is steady and interesting, but too many unnecessary scenes. it's a too digressive and useless push and pulls. The cast, I think it is just okay, but Han YeSeul definitely suited the role. My favorite characters definitely are Lee KangJoon and Gyo ChaeYeon. They have distinct uniqueness. The music just so-so but the one that sang by Jonghyun sounds good. Some BGM was too dramatic and not suitable. I am re-watching it several times but just some of them like ep 2-8.

Overall, it is an interesting story of complicated revenge, some episodes are bland and they should've made it exactly 16 episodes.