Father's House (2009)

Original title: 아버지의 집

The story revolves on the life of Kang Man Ho, who had a one-night stand with a pianist, Lee Hyun Jae. But because he needs to serve some time in prison, it wasn't until he got released that he realizes he had become a father; the mother has dropped off the boy with his closest relations (with a man that is like a father figure to Choi) and headed back home to the U.S. Although he didn't feel an immediate love for his son, the bond is solidified when both survived a bus crash, and after that near-death experience, he became determined to be a loving father