I'll start with a word of advice, don't go into this drama thinking you know anything. It is not at all what I expected and that was one of my favorite things about it. As the story unfolds you think you are watching a show about one thing, and you soon realize you were completely wrong. One of the reasons this show is amazing is that sometimes I felt like I was watching the Breakfast Club and at others it felt like I was watching a scene from Lord of the Flies or And Then There were None. I also was not expecting the characters to be as relatable as they were. I personally loved every single character in the school--whether they be villains or heroes (though it was sometimes very difficult to draw a clear line between the two). The music was surprising too. It's not often that you hear AC/DC and opera in K-Drama. Overall, this is a great watch. The story drew me in and while I had some serious doubts going in, I think that this drama is a great example of what happens when amazing writing, directing and acting come together perfectly.