Question: Kim Eui-sung is a south korean actor who starred in the film Office directed by who?
Context: Kim Ki-bum (born August 21, 1987) is a South Korean actor and singer.  He was a member of the South Korean boy band Super Junior.  After the release of Super Junior's third studio album "Sorry, Sorry" in 2009, Kim announced his leave from the group to pursue his acting career.  In 2015, Kim announced he ended his contract with S.M. Entertainment and departure from the group.  Kim made his television debut in the Korean television drama, "April Kiss", in 2004. Kim Yool-ho (; born February 21, 1985) is a South Korean actor and model, He is best known for his role in "The Map Against the World", in which he played Prince Geumwi, and the 2016 zombie thriller apocalypse film "Train to Busan" as "man in suit 2", who helps Yong-suk (played by Kim Eui-sung). Office (오피스 ) is 2015 South Korean slasher-thriller film directed by Hong Won-chan and starring Go Ah-sung and Park Sung-woong.  It is about a detective trying to figure out why a mild-mannered man has killed his family and is targeting his co-workers.  The film premiered at the Midnight Screenings section of the 2015 Cannes Film Festival. Kim Young-kwang (born January 11, 1987) is a South Korean actor and model.  Kim began his career as a model and has walked the runways of world-renowned designers such as Alexander McQueen, Vivienne Westwood and Etro.  In 2008, he was the first Asian model to walk Dior Homme's show.  As an actor, Kim has starred in the films "Runway Cop" (2012) and "Hot Young Bloods" (2014), as well as the television dramas "Pinocchio" (2014), "D-Day" (2015), "Sweet Stranger and Me" (2016) and Lookout (2017). Kim Sang-kyung (born June 1, 1972) is a South Korean actor.  He is best known for his leading roles in "Memories of Murder" (2003) and "May 18" (2007).  Two of his films directed by Hong Sang-soo, "Tale of Cinema" (2005) and "Ha Ha Ha" (2010), screened at the Cannes Film Festival.  Kim has also starred in numerous television dramas, notably the period epic "King Sejong the Great" (2008) and the family comedy "What's With This Family" (2014). Kim Dong-wook (born July 29, 1983) is a South Korean actor.  After appearing in student short films and several minor parts, Kim became a star through his supporting role in the popular TV series "Coffee Prince" (2007), followed by box office hit "Take Off" (2009).  He then starred in "Happy Killers" (2010) and "Romantic Heaven" (2011), but it was his acclaimed performance as an obsessed and tormented king in 2012 period drama "The Concubine" that brought Kim the best reviews of his career yet. Kim San-ho (born February 12, 1982) is a South Korean actor.  Kim is best known in musical theatre, having starred in Korean stage productions of "Grease", "The Fantasticks" and the Kim Kwang-seok jukebox musical "The Days".  On television, he has also appeared in the drama "Love, My Love" and several seasons of the sitcom "Rude Miss Young-ae". Kim Yoon-seok (born January 21, 1968) is a South Korean actor.  Kim's theater background first led him to be cast in minor roles on film and television.  His breakout role came as the villain in gambling film "" (2006), but it was his performance as an ex-cop turned pimp in surprise hit "The Chaser" (2008) that brought him acting awards and stardom in his forties.  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). The Day a Pig Fell Into the Well (돼지가 우물에 빠진 날, "Dwaejiga umul-e ppajin nal") is a 1996 Korean drama film and the directorial debut of Hong Sang-soo.  It stars Bang Eun-hee, Jo Eun-sook, Park Jin-song, Lee Eung-kyung and Kim Eui-sung.  It was also the feature film debut of Song Kang-ho.  The title derives from a 1954 book by John Cheever. Kim Eui-sung (; born December 17, 1965) is a South Korean actor.  He starred in film such as "Office" (2015), "" (2015), "Train to Busan" (2016) and "The Truth Beneath".  He also appears in the TV series "W" (2016).
Answer: film directed by Hong Won-chan