Question: Han Ji-hye's co star in Pianist was also a member of what South Korean boy group?

Context articles: Pots of Gold
Beyond the Clouds (TV series)
Han Ji-hye
Pianist (TV special)
The Duo
May Queen (TV series)
East of Eden (TV series)
Cloud Stairs
The Secret Lovers
Choi Min-ho (entertainer)

Pots of Gold (; lit.
 I Summon You, Gold!
 or Gold, Appear!)
 is a 2013 South Korean television series starring Han Ji-hye, Yeon Jung-hoon, Lee Tae-sung, Lee Soo-kyung, Baek Jin-hee, Park Seo-joon and Kim Hyung-jun.
 It aired on MBC from April 6 to September 22, 2013 on Saturdays and Sundays at 20:40 for 50 episodes.
Beyond the Clouds () is a 2014 South Korean television series starring Yoon Kye-sang, Han Ji-hye and Cho Jin-woong.
 It aired on KBS2 from February 17 to April 14, 2014 on Mondays and Tuesdays at 21:55 for 16 episodes.
Han Ji-hye (born Lee Ji-hye on June 29, 1984) is a South Korean actress.
Pianist () is a South Korean single-episode television drama starring Choi Minho and Han Ji-hye.
 It aired on November 27, 2010 as the 24th episode of "Drama Special", a weekly program on KBS2 showing short dramas (usually single episodes), with each episode having a different story, cast, director, and writer.
The Duo () is a 2011 South Korean historical drama series, starring Chun Jung-myung, Lee Sang-yoon, Han Ji-hye and Seo Hyun-jin.
 It aired on MBC from February 7 to May 24, 2011 on Mondays and Tuesdays at 21:55 for 32 episodes.
May Queen () is a 2012 South Korean melodrama series about three people who experience ambition, revenge, betrayal and love, against the backdrop of the shipbuilding industry in Ulsan during Korea's modernization.
 It stars Han Ji-hye, Kim Jaewon and Jae Hee.
East of Eden () is a 2008 South Korean television series, starring Song Seung-heon, Yeon Jung-hoon, Park Hae-jin, Lee Da-hae, Han Ji-hye, and Lee Yeon-hee.
 It was produced by Chorokbaem Media as a 47th Anniversary Special Project Drama for MBC, on which it aired from August 25, 2008 to March 10, 2009 on Mondays and Tuesdays at 21:55 for 56 episodes.
 The ₩25 billion drama tells the story of the brothers Dong-chul (Song) and Dong-wook (Yeon).
 Their fates diverge after the murder of their coal miner father, with one joining the mob and the other becoming a successful lawyer.
Cloud Stairs () is a 2006 South Korean television series starring Shin Dong-wook, Han Ji-hye, Im Jung-eun and Kim Jung-hyun.
 It aired on KBS2 from September 18 to November 7, 2006 on Mondays and Tuesdays at 21:55 for 16 episodes.
The Secret Lovers (; lit.
 "Secrets Between a Man and a Woman"), also known as A Man and a Woman, is a 2005 South Korean television series starring Han Ji-hye, Kim Suk-hoon, Song Seon-mi and Kwon Oh-joong.
 It aired on MBC from August 29 to November 1, 2005 on Mondays and Tuesdays at 21:55 for 20 episodes.
Choi Min-ho (born (1991--) 09, 1991 ), better known by the mononym Minho, is a South Korean singer and actor.
 He debuted as a member of South Korean boy group Shinee in May 2008.
 Aside from group activities as singer, he has debuted as an actor in November 2010 in a KBS2's drama special, entitled "Pianist".
 He has since had roles in various television dramas such as SBS's sitcom, "Salamander Guru and The Shadows" (2012), "To the Beautiful You" (2012), "Medical Top Team" (2013), "Because It's The First Time" (2015) and "" (2016).
 He made his big screen debut in 2016 with the movie "Canola".