05Class (05클라쓰) is a 7 member pre-debut girl group under JPlanet Entertainment. They are planned to debut in the second half of 2021. The girl group’s concept is a ‘class of young girls who were born in 2005’. The group consists of: Geumhee, Sua, Seoyeon, Yeham, Naeun, Yoonjeong and Duna. They have 2 former members.
At the beginning of 2020, J Planet Entertainment opened SNS accounts for their new upcoming girl group '05Class'. During the first half of the year, the group line up consisted of five members, which included Sua, Seoyeon, Yeham, Dahyun and Taehee. However, Dahyun and Taehee later departed from the group. As a result, four new members were added, which consisted of Geumhee, Naeun, Yoonjung and Duna.