Question: What network aired the series where Kim Woo-bin took on his first leading role?

Context articles: Uncontrollably Fond
2013 SBS Drama Awards
The Heirs
Coraima Torres
White Christmas (TV series)
Jeon So-min
Lee Hyun-woo (actor)
Kim So-hyun
Kim Woo-bin
Kim Ki-bang

Uncontrollably Fond () is a South Korean television series starring Kim Woo-bin and Bae Suzy.
 It aired every Wednesdays and Thursdays on KBS2 at 21:55 from July 6 to September 8, 2016.
The 2013 SBS Drama Awards () is a ceremony honoring the best performances in television on the SBS network for the year 2013.
 It was held at the SBS Prism Tower in Sangam-dong, Seoul on December 31, 2013, and hosted by Lee Hwi-jae, Lee Bo-young, and Kim Woo-bin.
The Heirs (왕관을 쓰려는 자, 그 무게를 견뎌라 – 상속자들 ), also known as The Inheritors, is a South Korean television series starring Lee Min-ho, Park Shin-hye and Kim Woo-bin.
 Written by Kim Eun-sook, the trendy drama is set in a high school populated by the privileged and uber-rich.
 It aired on SBS from October 9 to December 12, 2013 on Wednesdays and Thursdays at 22:00 for 20 episodes.
Coraima Alejandra Torres Díaz was born on June 6, 1973 in Valencia, Venezuela.
 She started her acting career in Venezuela, in the late 1980s.
 Her first roles were in the telenovelas "Gardenia" and "Alondra".
 She got her first leading role in 1992, in the famous telenovela "Kassandra", which was shown in more than 100 countries.
 After "Kassandra" she went to Colombia where she got a leading role in the telenovelas "Sueños y espejos" (Dreams and mirrors).
 Her partner in that telenovela was Colombian actor Nicolas Montero.
 They fell in love and got married in 1996.
White Christmas () is a 2011 South Korean television series starring Kim Sang-kyung, Baek Sung-hyun, and a cast of then-rookie actors, namely Kim Young-kwang, Lee Soo-hyuk, Kwak Jung-wook, Hong Jong-hyun, Esom, Kim Woo-bin, Sung Joon, Jung Suk-won, and Lee El.
 Written by Park Yeon-seon and directed by Kim Yong-soo, it aired as part of the Drama Special anthology series on KBS2 from January 30 to March 20, 2011 on Sundays at 23:15 for 8 episodes.
Jeon So-min (; born April 7, 1986) is a South Korean actress.
 She made her debut in 2004 MBC sitcom called "Miracle".
 In 2013, Jeon played her first leading role in the MBC television series "Princess Aurora".
 She received recognition from her role in the drama and won the "Best New Actress Award" in 2013 MBC Drama Awards.
 Her other performances as a leading role include in "1% of Anything (2016 TV series)" and "Tomorrow Victory (2015 TV series)".
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
Kim So-hyun (; born June 4, 1999), is a South Korean actress.
 She began her career as a child actress in 2006 and initially gained public attention for playing a villainous young queen-to-be in "Moon Embracing the Sun" (2012) and a girl who falls into tragedy in "Missing You" (2013).
 She took on her first leading role in teen drama "" (2015) and since then, has starred in horror comedy "Hey Ghost, Let's Fight" (2016) and historical melodrama "" (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".
Kim Ki-bang (born May 31, 1981) is a South Korean actor.
 Since his acting debut in 2005, Kim has played supporting roles in television dramas such as "Boys Over Flowers" (2009), "Golden Time" (2012), "Gu Family Book" (2013), "Medical Top Team" (2013), "My Lovely Girl" (2014), and "Heart to Heart" (2015).
 He played his first leading role in the film "Geochang Massacre - Bloody Winter" (2013).