24K is a dynamic five-member boy group housed under Choeun Entertainment, captivating fans with their electrifying performances since their debut on September 6, 2012 with the mini-album "Hurry Up". Originally known as a septet, the group's name symbolized "2 dancing machines and 4 main vocals", but has since transformed into a representation of everlasting brilliance akin to gold. Recent changes in the lineup saw Changsun parting ways with Choeun Entertainment on September 25, 2023 to pursue new endeavors as a member of TAN. Embracing a fresh start, 24K+ was introduced on November 4, 2023, unveiling their rebranded identity with the release of “Roller Coaster” on the 21st of the same month.