In August 2017, the duo joined forces with CJ E&M to launch a new entertainment company called High-Up Entertainment,[7] which became an independent company in 2018. In February 2019, the duo debuted their first boy duo 415 (Korean: 사이로).[8] In November 2020, the duo debuted their first girl group STAYC (Korean: 스테이씨).[9]
Rado (Korean: 라도; born Song Joo-young [송주영; 宋周英; Song Juyeong]) was born on July 11, 1984.[10][11] Prior to being a songwriter and music producer, he was a member of the now-defunct boy band Someday.[11][12] He was also known for collaborating with rapper Dok2, starting with the 2010 EP albumIt's We[13] and songs "Girl Girl" (together with The Quiett, from Thunderground Mixtape Vol. 2) and "Baby Let's Go" (together with The Quiett and B-Free, from Rapsolute Mixtape, Vol. 1), then the 2011 songs "Break Beatz" (together with Double K, from Flow 2 Flow), "That's Me" (from Hustle Real Hard) and "Come Closer/Flow2nite" (together with The Quiett, also from Hustle Real Hard), and the 2012 song "Love & Life" (from Love & Life, The Album).
