This manwha is pretty retarded. Its cool, but it's retarded: the most one dimensional characters ever, the villains are villains for the sake of being assholes without any benefit, the character trains until exhaustion after being in a coma for 9 months and instead of ending worse he grows until he is a fucking giant (and without any magic/ki/supernatural stuff involved), he just trains physically but has no actual combat experience, and he doesn't even hides the corpses from the police.
Don't get me wrong, it is funny to read, but is a retarded and utterly bad manwha.