Male Main Lead Uses Romance for Revenge

Like the title states, I want something along the lines of Shark, Bad Guy, Innocent Man and Hotel King (although Hotel King doesn't necessarily fit in, its close enough for me) 

And this is a bit unrelated to the original request, but also if you could recommend dramas where the main lead goes from a "good guy" to a "bad guy" for the sake of revenge. For example, Cruel City, IRIS II and Chuno 

I've been into revenge dramas lately so ive been trying to find some good ones.

Beyond the Clouds

''good guy'' turned into ''bad guy'' = the princess' man (although I didn't think of him as a bad guy at all lol I wanted him to get his revenge but there's a REAL change in the guy)