ATBO (에이티비오, stands for "At The Beginning of Originality") is a six-member boy group under IST Entertainment, formed through the survival show "The Origin – A, B, Or What?". The group currently consists of Oh Junseok, Ryu Junmin, Bae Hyunjun, Jeong Seunghwan, Kim Yeonkyu and Won Bin. Seok Rakwon left the group on May 06, 2024.

They debuted on July 27, 2022 with the mini album "The Beginning : 開花" with "Monochrome (Color)" as the title track.

They made their first comeback on October 26, 2022, with the mini album "The Beginning : 始作" with "ATTITUDE" as the title track.

As of June 27th 2024 ATBO (에이티비오) and JUST B (저스트비) have joined forces as a project group under the name of 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.