Question: What country of origin does 5urprise and Seo Kang-joon have in common?

Context paragraphs:
Cheese in the Trap (TV series): Cheese in the Trap () is a South Korean television series starring Park Hae-jin, Kim Go-eun, Seo Kang-joon and Lee Sung-kyung.  It aired on the cable network tvN on Mondays and Tuesdays for 16 episodes between 4 January–1 March 2016.  The series is based on the webtoon of the same name, serialized on Naver from 2010–2016, although it featured an original ending since the webtoon had not been completed at the time of filming.

Entourage (South Korean TV series): Entourage () is a South Korean television series starring Cho Jin-woong, Seo Kang-joon, Lee Kwang-soo, Park Jung-min and Lee Dong-hwi.  It is a black comedy drama about life in the entertainment industry, based on the American drama series of the same name.  It started airing on cable network tvN every Friday and Saturday at 23:00 (KST) from November 4, 2016, and finished airing December 24, 2016.

Seo Kang-joon: Seo Kang-joon (born Lee Seung-hwan on October 12, 1993) is a South Korean actor and singer who is a member of the group 5urprise.  He gained recognition with his role in the television series "Cheese in the Trap" (2016) and has since starred in "Entourage" (2016), and will headline KBS2's "Are You Human Too? " (2017).

Splendid Politics: Splendid Politics () is a 2015 South Korean television series starring Cha Seung-won, Lee Yeon-hee, Kim Jaewon, Seo Kang-joon, Han Joo-wan and Jo Sung-ha.  It aired on MBC from April 13 to September 29, 2015 on Mondays and Tuesdays at 22:00 for 50 episodes.

Kang Tae-oh: Kang Tae-oh (born Kim Yoon-hwan on June 20, 1994) is a South Korean actor and singer.  He is a member of 5urprise.

5urprise: 5urprise (), pronounced Surprise, is a "first ever South Korean actor group".  Formed in 2013, it consists of Seo Kang-joon, Gong Myung, Yoo Il, Kang Tae-oh and Lee Tae-hwan.

Yoo Il: Yoo Il (born Park Sang-il on January 11, 1990) is a South Korean actor.  In 2009, he made his debut as a former cast member of variety show "".  Since 2013, he is a member and the leader of Fantagio's actor group 5urprise.

Are You Human Too?: Are You Human Too?  (Hangul: 너도 인간이니 ; RR: "Neodo Inganini " ) is an upcoming South Korean television series starring Seo Kang-joon and Gong Seung-yeon.

Gong Myung: Gong Myung (born Kim Dong-hyun on May 26, 1994) is a South Korean actor.  He is a member of 5urprise.

Lee Tae-hwan: Lee Tae-hwan (Hangul: 이태환; born February 21, 1995) is a South Korean actor, model and singer.  Since his acting debut in 2013, he has starred in television dramas and web series, notably "Pride and Prejudice" (2014).  He is a member of 5urprise.

Supporting paragraphs: 5urprise Seo Kang-joon
Answer: South Korean