Yoo Yeon-seok (born Ahn Yeon-seok on April 11, 1984) is a South Korean actor.
 After making his acting debut in 2003 with a small role in "Oldboy", he resumed his acting career in 2008.
 His notable works include the films "Re-encounter" (2011), "Architecture 101" (2012), "A Werewolf Boy" (2012) and "Whistle Blower" (2014), "Perfect Proposal" (2015), "Mood of the Day" (2016) as well as the television series "Gu Family Book" (2013), "Reply 1994" (2013), "Warm and Cozy" (2015) and "Romantic Doctor, Teacher Kim" (2016).
Warm and Cozy () is a 2015 South Korean television series starring Kang So-ra and Yoo Yeon-seok.
 Written by the Hong sisters as a twist on the fable of "The Ant and the Grasshopper", it aired on MBC from May 13 to July 2, 2015 on Wednesdays and Thursdays at 22:00 for 16 episodes.
Romantic Doctor, Teacher Kim () is a 2016 South Korean television drama starring Han Suk-kyu as the title character with Yoo Yeon-seok and Seo Hyun-jin.
 It aired on SBS every Mondays and Tuesdays at 22:00 (KST) for 20 episodes from November 7, 2016 to January 16, 2017.
Love, Lies () is 2016 South Korean period drama film directed by Park Heung-sik, reuniting "The Beauty Inside" co-stars Han Hyo-joo, Chun Woo-hee and Yoo Yeon-seok.
 The story takes place in 1943, during the Imperial Japanese occupation of Korea.
 In the film, best friends Jung So-yul (Han Hyo-joo) and Seo Yeon-hee (Chun Woo-hee) are two of the last remaining "gisaeng".
 Although they enjoy pop music, they are committed to singing "jeongga", or classical Korean songs.
 So-yul's life falls apart when her lover, pop music producer Kim Yoon-woo (Yoo Yeon-seok), falls in love with Yeon-hee and helps her debut as a pop singer.
 The story follows So-yul's downward spiral as she is consumed by uncontrollable jealousy.
Mr. Sunshine () is an upcoming South Korean television series written by Kim Eun-sook and directed by Lee Eung-bok, starring Lee Byung-hun, Kim Tae-ri and Yoo Yeon-seok.
 The series will air on cable network tvN in early 2018.
Reply 1994 () is a 2013 South Korean television series starring Go Ara, Jung Woo, Yoo Yeon-seok, Kim Sung-kyun, Son Ho-jun, Baro, Min Do-hee, Sung Dong-il, and Lee Il-hwa.
 It aired on tvN on Fridays and Saturdays at 21:55 from October 18 to December 28, 2013 for 21 episodes.
Re-encounter (; lit.
 "Hye-hwa, Child") is a 2011 South Korean indie film written and directed by Min Yong-keun.
 Starring Yoo Da-in and Yoo Yeon-seok, it is a coming of age story about two young people who fall in love but lose contact when the girl becomes pregnant and the boy leaves her to go to Canada; they meet again after five years to look for their child, who they believe has been adopted.
The Royal Tailor () is a 2014 South Korean period film directed by Lee Won-suk, and starring Han Suk-kyu, Go Soo, Park Shin-hye and Yoo Yeon-seok.
 It tells the story of a rivalry between two tailors at the Sanguiwon, where the attire worn by royalty were made during the Joseon era, plunges the court into scandal and tragedy.
 The film was released in South Korea on December 24, 2014.
Mood of the Day () is 2016 South Korean film which stars Moon Chae-won and Yoo Yeon-seok
Split () is a 2016 South Korean film directed by Choi Kook-hee.
 It stars Yoo Ji-tae, Lee Jung-hyun, Lee David and Jung Sung-hwa.

Question: Yoo Yeon-seok born 1984 acted in what 2016 South Korean film 
Answer: Mood of the Day