NRG, acronym for New Radiancy Group (Hangul: 엔알지), was a South Korean pop music group. Originally a five-member boy band consisting of Chun Myung-hoon, Lee Sung-jin, Noh Yoo-min, Moon Sung-hoon, and Kim Hwan-sung, NRG debuted in 1997 and underwent sporadic periods of activity and hiatus between 2000 and 2008 before going on an extended hiatus. In 2017 they regrouped as a trio to celebrate the 20th anniversary of their debut and released an extended play. Members Past members Lee Sung-jin (Hangul: 이성진) – leader, vocals (1997-1999; 2001–2006; 2017–2018) Chun Myung-hoon (Hangul: 천명훈) – vocals, rap (1997-1999; 2001–2006; 2017–2018) Noh Yoo-min (Hangul: 노유민) – vocals (1997-2006; 2017–2018) Moon Sung-hoon (Hangul: 문성훈) (1997-2005) Kim Hwan-sung (Hangul: 김환성) (1997-2000; died 2000) Timeline History 1996: Formation Lee Sung-jin and Chun Myung-hoon originally debuted in 1996 as duet under the name HamoHamo and released one album with moderate success from the singles, "Papillion" and "Pangpang". Moon Sung-hoon and Noh Yoo-min originally backup dancers for HamoHamo. They were discovered by music producer Kim Tae-hyung (ko). Due to the success of the five-member idol group H.O.T, Kim Tae-hyung decided that they should become a four-member dance group. Kim Hwan-sung, who had previously been part of a quartet called Kkaebi Kkaebi and then a project group with Shoo of S.E.S. and Son Ho-young and Danny Ahn of g.o.d, was later added to the line-up. 1997–1999: Debut, breakthrough and line-up changes NRG debuted on October 28, 1997, on the cable music program Music Tank (ko) with the single "I Can Do It" (할 수 있어). Two weeks after their debut, the group held an MC spot for ten weeks on the show. Their first album New Radiancy Group sold over 200,000 copies in South Korea. At the 1998 SBS Popular Song Awards, NRG won the New Face Award (Best Male New Artist). According to H.O.T members Moon Hee-joon and Tony An, they had initially considered NRG their professional rival rather than Sechs Kies as NRG introduced acrobatic stunts into their choreography, which was considered groundbreaking at that time. NRG's second album Race was released that same year, and featured more high energy dance songs like "Messenger", selling over 300,000 copies in South Korea. With the second album, NRG was also able to find success outside of Korea, selling albums in both China and Japan. NRG became the first South Korean musical group to actively market themselves in China, where