Was born on June 23, 1981 (died May 27, 2011 aged 29). Chae attended Seoul Institute of the Arts and majored in Broadcasting and Kyung Hee Cyber University for Global Business. He first debuted in 2002 as a solo artist with Na Ture. He was the main vocal and leader for SG Wannabe when the group debuted until he left the group in March 2008 to purse a solo career. After leaving SG Wannabe, he released his second album Essay in 2009. In September 2010, he came back to the music scene with the track "Vanilla Sky" from his ballad single D-Day, which he wrote and composed. Chae was found dead in his apartment on May 27, 2011, where it seemed he had hung himself.