Question: Who was the director of a movie where Oh Jung-se played an onscreen supporting role?

Context paragraphs:
As One (film): As One (; lit.  "Korea") is a 2012 South Korean sports drama film starring Ha Ji-won and Bae Doona.  It is a cinematic retelling of the first ever post-war Unified Korea sports team which won the gold at the 1991 World Table Tennis Championships in Chiba, Japan.  Director Moon Hyun-sung used the foundation of true events to tell the story of a team that united a divided nation for the first time in its painful history.

How to Use Guys with Secret Tips: How to Use Guys with Secret Tips (; lit.  "A Manual on How to Use Men") is a 2013 South Korean romantic comedy film starring Lee Si-young and Oh Jung-se, and directed by Lee Won-suk.

Vampire Detective: Yoon San (Lee Joon) works as a private detective with his friend Yong Goo-Hyung (Oh Jung-se).  One day, Yoon San is turned into a vampire.  He remains a private detective who solves cases for his clients all the while uncovering the secrets from his past.

Asser Yassin: Asser Ashraf Fouad Yassin (born February 25, 1981) is an Egyptian actor, writer and film producer.  He has been awarded Best Actor for several of his works.Yassin began his career on the stage of the American University in Cairo spotted by Director Khairy Beshara to play his first role on TV in Qalb Habiba in 2006, followed by the block buster The Yacoubian Building in 2007.  His first major film release was Zay El Naharda (2008) where he was praised for his supporting role, playing the character of a drug addict.  In the same year, Yassin played a leading role in the movie "El Waad" a.k.a. The Promise, facing the legendary actor and super star Mahmoud Yassin.  In 2010, Yassin played the leading role in a Daoud Abdel Sayed movie Messages from the Sea, for which he was awarded Best Actor at the Carthage Film Festival, and Malmö Arab Film Festival.  He was also awarded Best Actor for his latest release Aswar El Qamar (2015) by The Tetouan International Mediterranean Film Festival.

Oh Jung-se: Oh Jung-se (born February 26, 1977) is a South Korean actor.  Oh began his career in theater, and has since appeared in many onscreen supporting roles over the years, notably in "Petty Romance" (2010), "Couples" (2011), "As One" (2012), "A Millionaire On the Run" (2012), and "Running Man" (2013).  But his performance in the 2013 romantic comedy "How to Use Guys with Secret Tips" earned him special attention from critics and viewers.  This led to Oh being cast in his first leading role in the 2013 film "The Hero".

Sunshine Love: Sunshine Love () is a 2013 South Korean romantic comedy film written and directed by Jo Eun-sung, starring Oh Jung-se and Jo Eun-ji.

Anju Kurian: Anju Kurian is an Indian film actress, mainly acted in Malayalam films.  Best known for her role in the 2016 Malayalam film "Kavi Uddheshichathu".  She started her career through Malayalam film industry by doing a supporting role in the movie Neram which directed by Alphonse Puthren.  The followed year she played a supporting cast Ohm Shanthi Oshaana and became famous through the supporting role in the big hit movie Premam.

Oh Darling! Yeh Hai India!: Oh Darling Yeh Hai India (English: "Oh Darling!  This is India") is an 1995 Indian musical parody film directed by Ketan Mehta, and starring Shah Rukh Khan, Deepa Sahi, Jaaved Jaffrey and Amrish Puri.  It also stars Anupam Kher in an important supporting role.

The Lover (TV series): The Lover () is a 2015 South Korean television series starring Oh Jung-se, Ryu Hyun-kyung, Jung Joon-young, Choi Yeo-jin, Park Jong-hwan, Ha Eun-seol, Takuya Terada and Lee Jae-joon.  It aired on Mnet from April 2 to June 25, 2015 on Thursdays at 23:00 for 12 episodes.

Plus Nine Boys: Plus Nine Boys (; lit.  "Boys Whose Ages End in Nine") is a 2014 South Korean television series starring Kim Young-kwang, Yook Sung-jae, Oh Jung-se and Choi Ro-woon.  It aired on tvN from August 29 to October 11, 2014 on Fridays and Saturdays at 20:50 for 14 episodes.

Supporting paragraphs: Oh Jung-se As One (film)
Answer: Moon Hyun-sung