Im Hyun-sik (Korean: 임현식; born March 7, 1992), simply known as Hyunsik, is a South Korean singer-songwriter and composer, and lead singer of the boy group BtoB.
Biography：Im Hyun-sik (Korean: 임현식; born March 7, 1992), simply known as Hyunsik, is a South Korean singer-songwriter and composer, and lead singer of the boy group BtoB.
