Timing is the fourth Korean mini-album by the leader and main rapper of what boyband?
Kim Hyun-joong Kim Hyun-joong (; born June 6, 1986) is a South Korean actor and singer, and the leader and main rapper of boyband SS501.
Nam Tae-hyun Nam Tae-hyun (born May 10, 1994), also known as Taehyun, is a South Korean singer-songwriter and actor. He is a former member of the K-pop group Winner, in which he was a main vocalist and was also involved in the production of the group's tracks. He is currently the lead singer of the band South Club.