This drama had so much potential, but it fell flat in a lot of ways. To start, almost all the female characters were unlikable, incredibly boring, and useless 99% of the time, which is really frustrating to watch. I'm especially dissapointed with Eunji's character arc. Having her take revenge on the bullies and going up against an immune Gwi Nam would have been epic. What a wasted oppertunity and a wasted character. It would bave been nice to see some character arcs play out a little differently. This story also has some pretty big plot holes, we never really find out what makes some people immune to the virus for instance, or what happened to Cheong-San's dad, or what the antidote was that delayed Byeong Chan's son's transformation. Overall, this drama had some good ideas but wasted too many opportunities and left way too many questions unanswered but if you're in the mood for mindless action, gore and zombies vs students then this is the drama for you.