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 (deceased), 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.
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.