ZEROBASEONE

ZEROBASEONE (Korean: 제로베이스원; initialized as ZB1) is a South Korean boy group under WAKEONE Entertainment, formed through Mnet's 2023 reality competition show BOYS PLANET. The group is composed of five members: Sung Hanbin, Kim Jiwoong, Seok Matthew, Kim Taerae and Park Gunwook. Originally a nine-piece ensemble, former members Zhang Hao, Ricky, Kim Gyuvin and Han Yujin departed from the group in March 2026. They debuted on July 10, 2023 with the track "In Bloom" from their debut extended play, YOUTH IN THE SHADE. Read more on Last.fm