So, in short, this drama is really not good. The acting of most actors and actresses here is wooden and artificial, particularly the FL... but you know what, it doesn't matter in this case. I openly admit I just watched the whole thing for Ji Chang-Wook visuals - Him in the gym, in a Gi, throwing strange marble balls into the air, fighting whatever enemies... just that, I simply don't care about the bad story - the end =D