Bang Yong-guk (born March 31, 1990) is a South Korean rapper, songwriter and record producer who served as the leader of boy group B.A.P up until his departure from TS Entertainment in August 2018. He made his musical debut in 2008 as a member of an underground hip hop group called Soul Connection under the alias of "Jepp Blackman". In March 2011, he featured on Song Ji-eun's single "Going Crazy", which became a number one hit in South Korea. In July of that year he released his first solo digital single