The first half of the first episode was kinda boring, it tells the backstory of the main guy. But the second half was good, I was hooked up and was kinda disappointed when the episode ends, the waiting for the next episode was exciting. Also, Im Jinah aka Nana's acting is really good here, I forgot that she was an idol before she was an actress, I personally think she should just be an actress instead of idol tbh, but missed her in Orange Caramel. I personally like the main guy lol, he's a cold blooded killer when it comes to human but he's animal protector lol