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