This was such a great drama! Wi Ha Joon and Ji Chang Wook portrayed their characters effortlessly. To be honest, all of the actors in that drama were fantastic. They managed to portray the emotions nicely.
The best thing in this drama is that, from the title, you think that "ah, the worst of evil refers to the fact that they are selling drugs and stuff," but you understand in the end that the worst of evil was, in the end, Huijeong and Park Junmo. Jung Gicheul's first love, the person he loved the most, and the person he trusted the most turned out to be traitors. They toyed with his feelings and emotions, and that is the worst evil, IMO.
Such a good drama! Highly recommend!