Question: Lee Min-ho, a South Korean actor and singer, starred in his first leading role in film with "Gangnam Blues",  a 2015 South Korean noir action film written and directed by who?

Context paragraphs:
Get Up (2008 film): Get Up is a 2008 South Korean television film on the educational problems of adolescents in schools.  It starred Lee Min-ho, Rhyme, and Choi Ah-jin.

Lee Min-ho (actor, born 1993): Lee Min-ho (Hangul: 이민호 ; Hanja: 李敏豪 ) (born June 28, 1993) is a South Korean actor.  He is well known for his role as young Yang Myung in "Moon Embracing the Sun" (2012) and Song Mang-boo in "Rooftop Prince" (2012).

Lee Hyun-woo (actor): Lee Hyun-woo (born March 23, 1993) is a South Korean actor and singer.  He began his career as a child actor when he was nine, and later appeared in the television series "The Return of Iljimae" (2009) and "Queen Seondeok" (2009).  He was also featured in "Master of Study" (2010) and "To the Beautiful You" (2012).  Lee gained recognition with his role as a North Korean spy in the 2013 film "Secretly, Greatly" as well as a genius hacker in 2014's "The Con Artists".  In 2016, he landed his first leading role in KBS2's "Moorim School".  In 2017, he starred in his second leading role in tvN's "The Liar and His Lover", alongside Red Velvet's Joy

Gangnam Blues: Gangnam Blues (; lit.  Gangnam 1970) is a 2015 South Korean noir action film written and directed by Yoo Ha, and starring Lee Min-ho and Kim Rae-won.  The film is set in the 1970s against the backdrop of the real estate development of Seoul's Gangnam district amidst socio-political turmoil and terrorism.  The friendship of two childhood friends is tested as they find themselves entangled in the collusion and battles between political powers and criminal organizations.

Inside Men (film): Inside Men () is a 2015 South Korean neo noir political crime action film written and directed by Woo Min-ho based on Yoon Tae-ho's webtoon "The Insiders" that dissects the corruption within Korean society.  Starring Lee Byung-hun, Jo Seung-woo and Baek Yoon-sik, it began filming in July 2014 and was released in theaters on November 19, 2015.

Go Kyung-pyo: Go Kyung-pyo (; born June 11, 1990) is a South Korean actor and comedian.  He gained recognition for his role in the television series "Reply 1988" (2015–16) and has since starred in "Jealousy Incarnate" (2016) and "Chicago Typewriter" (2017).  Go starred in his first leading role in KBS2's "Strongest Deliveryman" in August 2017.

Boom (entertainer): Lee Min-Ho (born May 10, 1982), better known as Boom (Hangul: 붐), is a South Korean rapper, singer, actor, radio host, and television presenter.  He has made numerous television appearances in South Korean comedy shows and has acted in sitcoms as well.

Lee Sang-yeob: Lee Sang-Yeob (born May 8, 1983) is a South Korean actor.  He is best known for starring in the sitcom "I Live in Cheongdam-dong" (2011), the melodrama "The Innocent Man" (2012), the period drama "Jang Ok-jung, Living by Love" (2013), and the latest drama "The Master of Revenge" (2016).  Lee was cast in his first leading role in the weekend drama "Give Love Away" (2013).

Lee Min-ho (actor, born 1987): Lee Min-ho (, born June 22, 1987) is a South Korean actor and singer.  He first gained widespread fame in Korea and parts of Asia with his role as Gu Jun-pyo in "Boys Over Flowers" in 2009.  The role won him a Best New Actor award at the 45th Baeksang Arts Awards.  He is noted for his leading roles in "City Hunter" (2011), "The Heirs" (2013) and "The Legend of the Blue Sea" (2016).  The success of Lee's television dramas throughout Asia established him as a top Hallyu star.  Lee starred in his first leading role in film with "Gangnam Blues" (2015), followed by his first China-produced film "Bounty Hunters" (2016).

Lee Joon-gi: Lee Joon-gi (born 17 April 1982) is a South Korean actor, singer and model.  He rose to fame on his first leading role playing a clown in the film "The King and the Clown" (2005) and the television series "My Girl" (2005).  Since then, he has starred in television series "Iljimae" (2008), "Arang and the Magistrate" (2012) "Scholar Who Walks The Night" (2015) and "" (2016).

Supporting paragraphs: Lee Min-ho (actor, born 1987) Gangnam Blues
Answer: Yoo Ha