So... I confess that one of the main reasons to watch it's because of Key's acting. In fact, his acting (like the other actors) is amazing! There are so much suspense in moments that you anxiously wait to know what's going happen and plots that make you very nervous. I like how in this drama shows that there is society that has so much problem with the others and is unjusted by overpowered organizations. This is a fact that happens with frequency in real life and the people and fight for justice to solve all the problems those happen with them. I recommend you to see, there's not any comedy part, but I am sure you won't regret to follow the misteries and the action scenes!