B2ST's Kikwang revealed the true hidden meaning behind 'AJ'. Boy group B2ST appeared as guests on the July 13th episode of MBC's "Radio Star". Before Kikwang was a member of B2ST, he debuted as a solo artist under the alias 'AJ.' The MC's questioned the acronym for 'AJ', and Kikwang revealed that it 'AJ' was short for, "Ace Junior", bringing laughs to the studio. Kikwang further elaborated, "I think I was aiming for Super Junior, a bit", to which Super Junior's Heechul replied, "Kikwang was very polite in greeting all of us in Super Junior at the time". Source: tvreport via Naver