Who was the director of this 2011 South Korean coming of age film, which starred Kim Yoon-seok?
Kim Yoon-seok: Kim Yoon-seok (born January 21, 1968) is a South Korean actor. Kim Yoon-seok:  Kim has since become an acclaimed leading actor, along with Choi Min-sik, Song Kang-ho, Sol Kyung-gu, Hwang Jung-min, Ha Jung-woo, in terms of acting talent and box office guarantee in Korean cinema, in films such as "Running Turtle" (2009), "The Yellow Sea" (2010), "Punch" (2011),"The Thieves" (2012), "" (2013), "Sea Fog" (2014), "The Classified File" (2015) and "The Priests" (2015). Punch (2011 film): Punch () is a 2011 South Korean coming-of-age film directed by Lee Han about the budding mentor-mentee relationship forged between a rebellious high school student from a poor household (Yoo Ah-in) and his meddlesome homeroom teacher who moves in next door (Kim Yoon-seok).
Lee Han