Korean drama/movie where main guy lead has tragic past?

Main male leads only please HAS to be more recent than. 2009 It has to be a big part of the story Watched: You're all surrounded City hunter Cruel city Iris Me too flower Missing you Can't remember anymore ATM. Preferably a good looking guy, thanks

For kdrama: Innocent Man/ Nice Guy School 2013 I hear your voice Doctor Stranger (not so sure about this one, haven't really tried it. heard the main lead got tragic past, don't know about how much it affected the plot) Chuno Hotel King Cain and Abel Anyway I do have other recommendation, but mostly not Korean though, interested?