설경구
After his doing his takes on the gangster genre (2006's "Righteous Ties") and the melodrama genre (2007's father-centered "My Son"), Jang wrote the witty script for Ra Hee-chan's "Going by the Book", about a mock bank robbery drill that turns embarrassingly real. He also injected an enhanced comic effect into the screenplay of "Public Enemy Returns", the third installment in Kang Woo-suk's series on tough detective Kang Cheol-jung (played by Sol Kyung-gu).