Treasure was formed in 2019 through YG Entertainment's audition program “YG Treasure Box” (2018-19). The band debuted as a 12-member group consisting of Choi Hyun-suk, Jihoon, Yoshi ...

In January 2019, YG announced a second lineup called Magnum, including Ha Yoon-bin, Mashiho, Doyoung, Yoshi, Jihoon, and Asahi. The two units were collectively referred to as Treasure 13.