A show similar to King of Dramas..?

Hi, I'm looking for other shows that are a little like that.

Specifically a little more mature vibe, great leading actors esp the female lead (the character portrayed

in that drama is one of my favorites so far - I like strong characters) and a storyline that's got some romance 

in it but intriguing and not very predictable. Really if you've watched that drama you'll know what I mean.

I'll appreciate any good recommendations, thanks! (: