Question: What actor starred in a 20 episode television series with Kim Sun-a and was a model in the 1990s?

Context paragraphs:
Yagami-kun no Katei no Jijō: Yagami-kun's Family Affairs (Japanese: 八神くんの家庭の事情 , Hepburn: Yagami-kun no Katei no Jijō ) is a manga series by Kei Kusunoki which was originally serialized in Japan in "Young Sunday" from March 1986 to May 1990.  The manga was later adapted into a three episode OVA series in 1990, and an eleven episode television drama.

My Lovely Sam Soon: My Lovely Sam-soon (; lit.  My Name Is Kim Sam-soon) is a South Korean television series based on the internet novel of the same title by Ji Soo-hyun, which was published on March 9, 2004.  Touted as the Korean version of "Bridget Jones's Diary", it starred Kim Sun-a (who gained 15 pounds for the role), Hyun Bin, Jung Ryeo-won and Daniel Henney.  The series aired on MBC from June 1 to July 21, 2005 on Wednesdays and Thursdays at 21:55 for 16 episodes.

List of Sankarea: Undying Love episodes: "" is a 2012 anime television series produced by Studio Deen.  The series has been based on the manga series by Mitsuru Hattori.  The story follows a boy named Chihiro Furuya and his relationship with Rea Sanka, a girl who dies and comes back to life as a zombie due to a resurrection potion Chihiro had made.  The 13-episode television series aired in Japan between April 5 and June 28, 2012.  Three additional original video animation episodes were released.  Episodes 00 and 14 were bundled with the limited editions of the 6th and 7th volumes of the manga respectively, which were published on June 8 and November 9, 2012.  Episode 13 was released with the anime series' 6th Blu-ray Disc and DVD volumes on November 30, 2012.

Scent of a Woman (TV series): Scent of a Woman () is a 2011 South Korean television drama series starring Kim Sun-a, Lee Dong-wook, Um Ki-joon and Seo Hyo-rim.  It aired on SBS from July 23 to September 11, 2011 on Saturdays and Sundays at 21:55 for 16 episodes.

I Do, I Do (TV series): I Do, I Do () is a 2012 South Korean romantic-comedy television series, starring Kim Sun-a, Lee Jang-woo, Park Gun-hyung and Im Soo-hyang.  It is about a successful shoe designer in her late 30s whose career is sidetracked when she accidentally becomes pregnant.

Cha Seung-won: Cha Seung-won (born 7 June 1970) is a South Korean actor who his career as an in-demand fashion model in the 1990s.  Cha achieved stardom through the hit comedy films "Kick the Moon" (2001); "Jail Breakers" (2002); "My Teacher, Mr. Kim" (2003); and "Ghost House" (2004).  After proving his versatility in other genres, notably in the period thriller "Blood Rain" (2005) and the melodrama "My Son" (2007), Cha's popularity continued with the television series "Bodyguard" (2003), "City Hall" (2009), and "The Greatest Love" (2011).

Kim Sun-a: Kim Sun-a (born October 1, 1973) is a South Korean actress.  She is best known for her titular role as Kim Sam-soon in the popular television series "My Lovely Sam Soon" (2005).  Other notable series include "City Hall" (2009) and "Scent of a Woman" (2011).

Era mio fratello: Era mio Fratello (Translation: "He was my Brother") is a two episode television miniseries that aired in 2007 on Rai Uno.  The first episode aired on 30 September 2007 in Italy and the second episode aired on 1 October that same year.  It is the first Italian television series having 'ndrangheta as main theme.  Filming took place in Calabria, in the cities of Reggio Calabria, Palmi, Catona, Melito and Pentedattilo.  The "La Repubblica" television critic apprecciated the miniseries, commenting that it has "the same rhythm and language of the most modern crime series".

Masked Prosecutor: Masked Prosecutor () is a 2015 South Korean television drama series starring Joo Sang-wook and Kim Sun-a.  It aired on KBS2 from May 20 to July 9, 2015 on Wednesdays and Thursdays at 21:55 for 16 episodes.

The City Hall (TV series): The City Hall (; lit.  "City Hall") is a 2009 South Korean television series starring Kim Sun-a and Cha Seung-won.  It aired on SBS from April 29 to July 2, 2009 on Wednesdays and Thursdays at 21:55 for 20 episodes.

Supporting paragraphs: The City Hall (TV series) Cha Seung-won
Answer: Cha Seung-won