Let Me Out () is a 2013 South Korean film.
 Part coming-of-age, part comedy, the low-budget indie is about a film student's struggles with making a movie for the first time, and captures the harsh realities of the Korean filmmaking industry.
 Produced by the Seoul Institute of the Arts and the Baekdu-Daegan Film Company, it was directed by Soh Jae-young (or Jae Soh) and Kim Chang-rae, and starred Kwon Hyun-sang in his first leading role.
Jang Ok-jung, Living by Love () is a 2013 South Korean historical television series, starring Kim Tae-hee, Yoo Ah-in, Hong Soo-hyun and Jae Hee.
 Based on the 2008 novel by Choi Jung-mi, it is a reinterpretation of Jang Hui-bin's life, as a woman involved in fashion design and cosmetics-making in the Joseon Dynasty.
One Mom and Three Dads () is a 2008 South Korean television series starring Eugene, Jo Hyun-jae, Jae Hee, and Shin Sung-rok.
 It aired on KBS2 from April 4 to May 22, 2008 on Mondays and Tuesdays at 21:55 for 16 episodes.
Bloody Beach () is a 2000 South Korean slasher film starring Kim Hyun-jung and Jae Hee.
May Queen () is a 2012 South Korean melodrama series about three people who experience ambition, revenge, betrayal and love, against the backdrop of the shipbuilding industry in Ulsan during Korea's modernization.
 It stars Han Ji-hye, Kim Jaewon and Jae Hee.
Jae Hee (born Lee Hyun-kyun on May 25, 1980) is a South Korean actor.
 He is best known for his leading roles in the 2004 arthouse film "3-Iron" and the 2005 television series "Sassy Girl Chun-hyang".
Jae-hee is a Korean unisex given name.
 Its meaning depends on the hanja used to write each syllable of the name.
 There are 20 hanja with the reading "jae" and 24 hanja with the reading "hee" on the South Korean government's official list of hanja which may be registered for use in given names.
Sassy Girl Chun-hyang (; lit.
 Delightful Girl Chun-hyang) is a 2005 South Korean television series starring Han Chae-young, Jae Hee, Uhm Tae-woong and Park Si-eun.
 It aired on KBS2 from January 3 to March 1, 2005 on Mondays and Tuesdays at 21:55 for 17 episodes.
3-Iron (; lit.
 "Empty House") is a 2004 South Korean romantic drama film directed by Kim Ki-duk.
 The plot revolves around the relationship between a young drifter and an abused housewife.
 The film is notable for the lack of dialogue between its two main characters.
 The title comes from a type of golf club used prominently in the film.
Treeless Mountain () is a 2008 South Korean drama film written and directed by So Yong Kim.
 It stars Hee Yeon Kim, Song Hee Kim, Soo Ah Lee, Mi Hyang Kim, and Boon Tak Park.
 The film premiered on 5 September 2008 at the 2008 Toronto International Film Festival and was given a limited release in the United States on 22 April 2009.

Question: what is the name of the South Korean romantic drama film in which Jae Hee had a leading role?
Answer: 3-Iron