Zerobaseone

Zerobaseone (Korean: 제로베이스원; stylized in all caps; abbreviated as ZB1) is a South Korean boy band formed through Mnet's reality competition program Boys Planet and managed by WakeOne. The group consists of five members: Kim Ji-woong, Sung Han-bin, Seok Matthew, Kim Tae-rae, and Park Gun-wook. Zerobaseone was originally a nine-piece ensemble; members Zhang Hao, Ricky, Kim Gyu-vin, and Han Yu-jin left the group in March 2026 following their contract expiration. Zerobaseone debuted on July 10, 2023, with the extended play (EP) Youth in the Shade and was commercially successful upon release, selling over two million units, peaking at number one on South Korean Circle Album Chart and being included among the best-selling albums worldwide of the year according to International Federation of the Phonographic Industry (IFPI). In addition, the EP's lead single, "In Bloom", charted on Billboard Global 200. The group earned a "Rookie Grand Slam" (2023–2024) by sweeping the ten Rookie of the Year awards at different domestic award ceremonies, including Golden Disc Awards, MAMA Awards, Melon Music Awards, and Seoul Music Awards.