Fashion King () is a 2012 South Korean television drama starring Yoo Ah-in, Shin Se-kyung, Lee Je-hoon and Kwon Yuri.
 It aired on SBS from March 19 to May 22, 2012 on Mondays and Tuesdays at 21:55 for 20 episodes.
Twenty () is a 2015 South Korean coming-of-age film starring Kim Woo-bin, Lee Junho and Kang Ha-neul.
 It was written and directed by Lee Byeong-heon, his second feature after the 2012 indie "Cheer Up, Mr. Lee".
He Who Can't Marry () is a 2009 South Korean television series starring Ji Jin-hee, Uhm Jung-hwa, Kim So-eun, Yoo Ah-in and Yang Jung-a.
 A romantic comedy about an extremely stubborn and inflexible 40-year-old bachelor, it is a remake of the 2006 Japanese drama "Kekkon Dekinai Otoko".
The Throne () is a 2015 South Korean historical period drama film directed by Lee Joon-ik, starring Song Kang-ho and Yoo Ah-in.
 Set during the reign of King Yeongjo, the film is about the life of Crown Prince Sado, the heir to the throne who was deemed unfit to rule and, at age 27, was condemned to death by his own father by getting locked in a rice chest for eight days until he suffocated and starved.
Tough as Iron () is a 2013 South Korean film written and directed by Ahn Gwon-tae, starring Yoo Ah-in in the title role.
Yoo Ah-in (born Uhm Hong-sik on October 6, 1986) is a South Korean film and television actor.
 He rose to fame after starring in the 2010 television series "Sungkyunkwan Scandal".
 Yoo Ah-in is best known for his leading roles in the coming-of-age film "Punch" (2011), melodrama "Secret Love Affair" (2014), action blockbuster "Veteran" (2015), period drama "The Throne" (2015), and the historical television series "Six Flying Dragons" (2015-2016).
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).
Six Flying Dragons () is a South Korean television series starring Yoo Ah-in, Kim Myung-min, Shin Se-kyung, Byun Yo-han, Yoon Kyun-sang and Chun Ho-jin.
 It aired on SBS on Mondays and Tuesdays at 22:00 for 50 episodes beginning on October 5, 2015, as part of SBS 25th anniversary special.
 The drama serves as a loose prequel to "Deep Rooted Tree".
"Unbalance Unbalance" is a Korean manhwa series written by Dall-Young Lim and illustrated by Soo-Hyun Lee.
 The series focuses on Jin-Ho Myung, a slacker student in his last year of high school, and Hae-Young Nah, a beautiful young woman in her mid-twenties who is revealed to be Jin-Ho's homeroom teacher.
 The story focuses on the ongoing romantic relationship between the two, as well as other relationships with other girls in Jin-Ho's life as the story progresses.
Lee Han (born 1970) is a South Korean film director and screenwriter.
 He is best known for the coming-of-age film "Punch", which became one of the biggest hits on the South Korean box office in 2011.

Question: Yoo Ah-in (born Uhm Hong-sik on October 6, 1986) is a South Korean film and television actor, Yoo Ah-in is best known for his leading roles in the coming-of-age film Punch, a South Korean coming-of-age film directed by Lee Han, made in which year, 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?
Answer: 2011