This is one of the best show I have ever watched each of these characters were just amazing felt an emotional connection with the characters. The action, acting, camera work, cinematography everything is just top-notch. I know some people are hating this for dumb reasons but let me tell these kids are stuck in school so finding weapons is very difficult also they had to save their lives by themselves so they really needed to work a lot. Also, the half-zombie angle is the one thing that sets apart this series from the rest, it's definitely interesting to watch.
The season ended with a lot of questions and a cliffhanger so definitely, there will be season 2 with more amazing stuff and Cheong san returning as a half-zombie.