My Lover, Madame Butterfly () is a South Korean romantic comedy television series starring Yum Jung-ah, Park Yong-woo, Kim Sung-soo, and Yoon Se-ah.
 It aired on SBS from October 16, 2012 to April 7, 2013 on Saturdays and Sundays at 20:40 for 51 episodes.
Lovers in Prague () is a 2005 South Korean television drama series starring Jeon Do-yeon, Kim Joo-hyuk, Kim Min-joon and Yoon Se-ah.
 It aired on SBS from September 24 to November 20, 2005 on Saturdays and Sundays at 21:45 for 18 episodes.
Smile Again () is a 2006 South Korea television series starring Lee Dong-gun, Kim Hee-sun, Lee Jin-wook and Yoon Se-ah.
 It aired on SBS from May 17 to July 6, 2006 on Wednesdays and Thursdays at 21:55 for 16 episodes.
Panda and Hedgehog () is a 2012 South Korean romantic comedy television series starring Lee Donghae of Super Junior and Yoon Seung-ah.
 Produced by Song Hae-sung's TV production venture Lion Fish, it aired on Channel A from August 18 to October 7, 2012 on Saturdays and Sundays at 21:55 for 16 episodes.
Wife Returns (; also known as My Wife is Back) is a South Korean television series starring Kang Sung-yeon, Jo Min-ki, Yoon Se-ah, Park Jung-chul, and Kim Mu-yeol.
 It aired on SBS from November 2, 2009 to April 16, 2010 on Mondays to Fridays at 19:20 for 116 episodes.
 The melodrama deals with a broken family, betrayal, adultery and revenge with a dash of violence.
 "Wife Returns" revolves around a woman who gets revenge on the husband of her identical twin sister.
 The sister was forced to leave her husband and their child by her mother-in-law.
Kim Sung-soo (born May 23, 1973) is a South Korean actor and television host.
 After beginning his career as a fashion model, Kim made his acting debut in the tokusatsu series "Vectorman" and the erotic film "The Sweet Sex and Love".
 He has since appeared in the movies "The Red Shoes" and "", and several television series, including "Full House", "My Precious You", "More Charming by the Day" and "My Lover, Madame Butterfly".
 In 2009 he made his stage debut in the play "Mom, Do You Want to Go on a Trip?"
Let's Eat 2 () is a South Korean television series starring Yoon Doo-joon, Seo Hyun-jin and Kwon Yul.
 It aired on tvN from April 6, 2015 to June 2, 2015 on Mondays and Tuesdays at 23:00 for 18 episodes.
 This is the second season of 2013 "Let's Eat" series, with Yoon Doo-joon reprising his role as Goo Dae-young, who moves to Sejong City and befriends new neighbors and friends played by Seo Hyun-jin and Kwon Yul.
The Greatest Love (; also known as Best Love) is a 2011 South Korean romantic comedy television series about true love in the fake world of entertainment.
 Starring Cha Seung-won, Gong Hyo-jin, Yoon Kye-sang and Yoo In-na, it aired on MBC from May 4 to June 23, 2011 on Wednesdays and Thursdays at 21:55 for 16 episodes.
Yoon Se-ah (born January 2, 1978) is a South Korean actress.
 She is best known for her roles in the TV dramas "City Hall", "Wife Returns", and "A Gentleman's Dignity".
Queen of Housewives (; also known as My Wife Is a Superwoman) is a 2009 South Korean romantic comedy television series, starring Kim Nam-joo, Oh Ji-ho, Yoon Sang-hyun, Lee Hye-young, Choi Cheol-ho, and Sunwoo Sun.
 It depicts the life of "naejo," housewives who devote their entire lives to their husbands' success, but with a more comedic and aggressive twist.
 It aired on MBC from March 16 to May 19, 2009 on Mondays and Tuesdays at 21:55 for 20 episodes.

Question: My Lover, Madame Butterfly, is a South Korean romantic comedy television series starring Yoon Se-ah, an actress of which nationality?
Answer: South Korean