015B, also known as Gongil Obi, is a pioneering producer group from Korea that made their debut in 1990. The trio - Hyung-Gon Cho, Hyun-Chan Cho, and Seok-won Jeong originally members of caterpillar, which won the grand prize at the 1988 MBC University Song Festival. Their unique sound and innovative approach greatly impacted the Korean music scene throughout the 1990s. The name 015B symbolizes Infinite Orbit, reflecting their endless creativity and boundless potential. Their discography includes a series of studio albums known as "Yearbooks", with "Yearbook 2018" released on February 27, 2019 and their most recent release being "Yearbook 2023" on February 28, 2024. Despite their long career, 015B remains active and continues to engage with fans through regular updates on their website.