Rapper and half from the Korean hiphop group Active Duo with Choiza. They increased to fame following a launch of their debut recording Taxi Drivers, which became the best-selling hiphop recording in South Korea. He loved success like a single artist along with his strike “Rhythm is Existence.” He and Choiza originally created the group CB Mass in 1999 however they disbanded in 2003 after finding their third member was stealing cash. Their second recording Double Dynamite received Best HIPHOP Album in the 2006 Korean Music Honours. He was created Kim Yoon-sung but goes on the stage name Gaeko. He and partner Choiza had been childhood close friends who was raised together.