BIGBANG: The Beginning(2006)

"BIGBANG: The Beginning" (in Korean: 리얼다큐 빅뱅: 더 베기닝) is a documentary series that follows the K-pop group Big Bang's journey from their pre-debut days to their official debut, capturing their training, auditions, and the formation of the group, including the eventual departure of Hyun-seung.