8.4 2012
Ji Hyun Woo stars in both dramas and both have historical elements.
Invincible Lee Pyung Kang (2009)
Similars
6.7 2011
It starts out as "enemies" than they end up living together.
6.5 2009
Both these dramas are typical Romance Comedies with sports involved. Invincible Lee Pyung Kang is golf based, and Heading to the Ground is Soccer based.
7.1 2012
both have the guy that support you behind the scene while hiding his identity and the girl somehow later get to know them because of work related issue
7.8 2005
Both dramas star fiesty female leads who are also relatively poor.