Radiant Office (Hangul: 자체발광 오피스 ; RR: "Jachebalgwang Opiseu "; lit.
 "Self-Dazzling Office" ) is a 2017 South Korean television series starring Go Ah-sung and Ha Seok-jin.
 The series is written by a rookie screenwriter who won the 2016 MBC TV Drama Screenplay Competition in Miniseries category.
 It aired on MBC from March 15 to May 4, 2017 on Wednesdays and Thursdays at 22:00 (KST) for 16 episodes.
Thread of Lies (; lit.
 Elegant Lies) is a 2014 South Korean film based on the 2009 bestselling novel "Elegant Lies" by Kim Ryeo-ryeong.
 Directed by Lee Han, it starred Kim Hee-ae (in her first film in 21 years), Go Ah-sung, Kim Hyang-gi and Kim Yoo-jung.
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.
Go Ah-sung (born 10 August 1992) is a South Korean actress.
 She began her career as a child actress, notably in 2006 top-grossing blockbuster "The Host".
 This was followed by major roles in "Snowpiercer" (2013), "Thread of Lies" (2014) and "Office" (2015), as well as the TV dramas "Master of Study" (2010) and "Heard It Through the Grapevine" (2015).
Master of Study (; lit.
 "God of Study", "Lord of Study") is a South Korean television series that aired on KBS2 from January 4 to February 23, 2010 on Mondays and Tuesdays at 21:55 for 16 episodes.
 It starred Kim Su-ro, Bae Doona, Oh Yoon-ah, Yoo Seung-ho, Go Ah-sung, Lee Hyun-woo, Park Ji-yeon,
Snowpiercer (Hangul: 설국열차 ; Hanja: 雪國列車 ; RR: "Seolgungnyeolcha " ) is a 2013 English-language South Korean-Czech science fiction thriller film based on the French graphic novel "Le Transperceneige" by Jacques Lob, Benjamin Legrand and Jean-Marc Rochette.
 The film is directed by Bong Joon-ho, and written by Bong and Kelly Masterson.
 The film marks Bong's English-language debut; approximately 80% of the film was shot in English.
After the Banquet (; lit.
 "After the Wedding") is a 2009 South Korean-Japanese film starring Shin Sung-woo, Ye Ji-won, Bae Soo-bin, Kim Bo-kyung, Lee Hae-young, Seo Yoo-jung, Yoon Hee-seok, Cha Soo-yeon, and Go Ah-sung.
 A group of college alumni, mostly men, are reunited at a wedding.
 They are all looking forward to seeing one woman in particular, but to their surprise, the woman's daughter appears.
Heard It Through the Grapevine () is a 2015 South Korean television series starring Yoo Jun-sang, Yoo Ho-jeong, Go Ah-sung, and Lee Joon.
 It aired on SBS from February 23 to June 2, 2015 on Mondays and Tuesdays at 21:55 for 30 episodes.
Lee O Young (born January 15, 1934) is a South Korean critic and novelist.
 Although the romanized spelling of the hangul name "이어령" might be Yi O-Ryŏng or Lee Eo-ryeong, Lee O Young is the author's preferred romanization according to the Literature Translation Institute of Korea.
The Host (; lit.
 "Monster") is a 2006 South Korean monster film directed by Bong Joon-ho and starring Song Kang-ho, Byun Hee-bong, Park Hae-il, Bae Doona and Go Ah-sung.

Question: What is the Hangul name of the 2013 film which Go Ah-sung had a major role in?
Answer: 설국열차