Question: What is the name of the South Korean model and actor, who starred in Who Are You: School 2015?
Context: Ahn Jae-hyun (; born 1 July 1987) is a South Korean model and actor.  He is best known for his roles in television dramas such as "My Love from the Star" (2013), "You're All Surrounded" (2014), "Blood" (2015), "Cinderella and Four Knights" (2016) and "Reunited Worlds" (2017). Kim Woo-bin (born Kim Hyun-joong on July 16, 1989) is a South Korean model and actor.  He began his career as a runway model and made his acting debut in the television drama "White Christmas".  He subsequently gained attention in "A Gentleman's Dignity" (2012), and made his breakthrough with "School 2013" (2012-2013) and "The Heirs" (2013).  Kim later starred in box office hits "" (2013), "The Con Artists" (2014) and "Twenty" (2015).  In 2016, he took on his first leading role on television in "Uncontrollably Fond". Who Are You: School 2015 (Hangul: 후아유: 학교 2015 ; RR: "Huayu: Hakgyo 2015 " ) is a South Korean television series, starring Kim So-hyun, Nam Joo-hyuk, and Yook Sung-jae.  It aired on KBS2 from April 27 to June 16, 2015 every Monday and Tuesday at 21:55 KST for 16 episodes.  It is the sixth installment of KBS's "School" series which premiered in 1999. Choi Han-bit (Hangul: 최한빛 ) is a South Korean model, actress & singer.  She is a member of the South-Korean girlgroup "Mercury".  She is a graduate of the School of Dance at the Korean National University of Arts in Seoul, where she majored in Korean traditional dance.  With the support of her parents, Choi underwent male-to-female sex reassignment surgery in 2006.  She changed her given name from Han-jin to Han-bit, and is legally recognized as female in South Korea.  In an interview, Choi said that "living with the female body itself brought me the greatest feeling of euphoria", but also that she has "a fond memory of the past before the operation".  Prior to her surgery, she had appeared on the Seoul Broadcasting System (SBS) television show "Yoo Jae-suk's Jinsil Game" in 2005.  She was a contestant on "Korea's Next Top Model, Cycle 3", where she ended 10th. Lee Pa-ni (born January 22, 1986) is a South Korean model and actress.  In 2006, she was selected as the winner of Spice TV’s "Playboy" 2006 Korea Model Contest.  She is often reported to be the first Korean model to appear in the magazine; however, that distinction goes to Lee Sa-bi. Jang Yoon-ju (born November 7, 1980) is a South Korean model, television personality, singer-songwriter and actress.  Jang began modeling in 1997 when she was 17 years old, and became one of the most successful Korean fashion models, with a career spanning almost two decades.  She also hosts "Korea's Next Top Model", and won Best Radio DJ at the 2013 KBS Entertainment Awards for KBS Cool FM's "Rooftop Radio".  As a singer-songwriter, Jang has released two albums, "Dream" (2008) and "I'm Fine" (2012).  She made her acting debut in 2015, playing a detective in Ryoo Seung-wan's crime thriller "Veteran". Byun Jung-soo (born April 15, 1974) is a South Korean model and actress.  As a model in the 1990s, Byun walked the runways in Seoul, Paris and New York, notably for the brand Kenzo.  She began acting in 2002, and starred in television dramas such as "Women Next Door" (2003), "You're Not Alone" (2004), "Can Love Be Refilled?"  (2005), "The Last Scandal of My Life" (2008) and "Manny" (2011).  In 2005, Byun became the creative director for clothing label Ellahoya, when it launched its higher-end line for the Hyundai Home Shopping Network.  Known for her chic sense of style, in 2008 she became the host of talk show "Olive Show", which featured trends in fashion.  Byun also created the make-up line Licht in 2009, and has written three books. Nam Joo-hyuk (born February 22, 1994) is a South Korean model and actor.  He has starred in "" (2015), "Weightlifting Fairy Kim Bok-joo" (2016) and "Bride of the Water God" (2017). Lee Sa-bi (born Lee Eon-jeong on July 3, 1977) is a South Korean model and actress.  She began her modelling career as a runway model in Daegu in 1998.  Lee was the first native Korean to become a Playboy model.  Her nude photo shoot was published in February 2004, and broadcast by South Korea's three largest telecommunication carriers to 16 mobile and internet services.  Lee has since appeared in minor roles on TV and film since her acting debut in "2009 Lost Memories" (2002).  She also released a yoga exercise video in 2006. Lee So-ra (Korean: 이소라; born November 4, 1969) is a South Korean model and Radio DJ.  She was an original member of "Roommate".  She started her career by winning the "Super Model Contest".  She is currently a DJ on a radio show entitled Lee So Ra's Gayo Plaza.
Answer: Nam Joo-hyuk