7th Grade Civil Servant (2013)

If you enjoyed this drama you will also enjoy Joo Won's other project (Bridal Mask). Although is not a romantic drama it holds a lot of history and it's really really good. Personally i like to watch different dramas and movies from the same actor to judge him or her better as an actor.

You'll really get his full charm with this action-historical drama.

Same kind of story - new secret agent guy, girl who is caught between him and the agency. Level 7 had gaping plot holes though, and Parachute was done much better.