The Scary One, The Ghost and I 2010 무서운 놈과 귀신과 나

Kang Doo-Sub (Lee Won-Jong) is a gangster and people are afraid of him. One day, he finds a female high school student ghost looking at him. He freaks out and tries to get rid of the ghost, but, no matter what, the ghost is still there. Kang Doo-Sub turns to a private detective.