All rights belong to its rightful ownerowners. The boy groups included are groups that have not disbanded. It could be that some just have longer training periods debuts can get canceled personal life situations etc.
Seo Taiji 45 years old February 21 1972 7.
This list does not include web dramas drama specials or former idols. Its not easy for K-Pop idols to keep going once they hit their later years as. All rights belong to its rightful owner. KPop idols are only humans like Korean Pop fans.