In the beginning, I thought that the first episode was okay, but I was waiting for the characters to develop and the plot to become more interesting. However, it did not work for me that way.
The characters are bland, the acting is very stiff and did not make me feel any emotion other than annoyance. (especially Nayeon who was extremely irritating from the beginning) The main character even if she is showing some 'range' of emotions, I could not feel the emotions with her.
I did not find one character that could be likeable in this show, other than Chung San's mother. All of the characters in this series are extremely stupid... like: "we have a good place to hide - let's go somewhere else now!". The ones who survived managed to do this only by luck and (unnecessary) sacrifice of others.
This show was (in my opinion) exhausting to watch.