R.ef was a South Korean boyband trio active primarily between 1995 and 1999, with a brief reformation in 2004. The group consisted of Lee Sung Wook, Park Chul Woo, and Sung Dae Hyun. Discography: Rave Effect (1995) Back to the Black (1996) Memories in Fall (1996) Ruff Eazy Flava (1997) R.ef: Forever (1998) R.ef: The Last (1999) Read more on Last.fm