the best psychopath korean drama

Lee seung gi 's Dark intense psycho thrilling series..
the best psychopath korean drama i've seen so far. .. i love this kind of drama coz it is not boring and every episode is worth the wait...
The best psychological thriller with detail explanation without any chance of typical clichés.
Cinematography, writing ,direction and music are on point.
Writing was just perfect without any deviation they are giving every single detail and every character is connected not only the main leads even a supporting character is great.