Jae Joo So Nyeon.

The profile also notes that Jae Joo So Nyeon (재주소년) originally debuted as a duo in 2003 with their eponymous album. Another profile detail is that they were under Pastel Music and their line-up consisted of Yoo Sangbong and Park Kyounghwan. Additional background says that they split up in 2011, with Park Kyounghwan retaining the duo’s name to continue his activities as a solo artist. The profile also notes that in 2014, they re-united to release their fifth studio album, To Dream (꿈으로), only to split for good after their last performance as a duo in November 2016.