JUST B (저스트비) is a six-member boy group under Bluedot Entertainment. They debuted on June 30th, 2021 with their mini-album "Just Burn". The group consists of: Lim Jimin (임지민), Geonu (건우), Bain (배인), Siwoo (former JM /제이엠), DY (디와이), and Sangwoo (상우).

DY and Bain are former participants of the survival reality competition series Under Nineteen, where DY took first place and debuted with a center position in a boy group 1THE9. Geonu and JM are also former participants of the survival show I-LAND. Prior to his group debut, Lim Jimin made his solo debut on May 12, 2019 with his first single "Mini".

As of June 27th, 2024 Just B and ATBO have joined forces as a project group under the name The CrewOne with a shared management through IST Entertainment. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.