Take me away:
I'll definitely check this out again
I'm sure you will dropp it again, I can't understand why it's popular or how it is dark or ML is dark... it's very cheep primitive cliche drama with bed production quality and I couldn't take ML seriously especially as dark-kinda bad guy...
try "love to kill" or "cruel city" (second one isn't romance centered but story, ML and romance, everything is kind of dark and mature, twists and turns in every episode. Name is very correct to the feeling of the drama - cruel city (also called heartless city), really great drama!