Hi

I want to watch something similar to Ghost K-drama 

or recommend some thriller and melodrama to watch 

I'm sick of the repetitive plots in the drama theses days because most of them are romantic comedy which I don't prefer.

Dramas: Bump Off Lover, Alice no Toge, Golden Empire, Liar Game

Movies: Infernal Affairs, Confessions
Drama: A Man's Story; Bad Guys
Similar to Ghost:
Sign
The Incarnation of Money

There is another drama which is very similar to Ghost(computer) but it's Japanese, so I'll just put it here in case you're curious, Bloody Monday.
Thank you so much !!