Sleepy

Sleepy (Kim Sung-won) is a prominent South Korean rapper who first gained major recognition as one half of the hip-hop duo Untouchable, formed under TS Entertainment in 2008. His sound identity is defined by a signature raspy baritone and a versatile flow that adapts to both aggressive rap tracks and more melodic, pop-leaning collaborations.

Over his career, he has successfully navigated the transition from the 'idol-adjacent' hip-hop of the late 2000s to the more independent, variety-show-integrated landscape of the 2010s and 2020s. His cultural position is unique; he is as well-known for his comedic 'weakling' persona on variety television as he is for his technical rap ability, a duality that has helped him maintain longevity in a fast-moving industry. Influenced by 90s East Coast boom-bap and modern trap, his work often features collaborations with artists like ZICO and CHANGMO, placing him firmly within the mainstream K-Hip-Hop lineage. Critical consensus highlights his distinctive vocal tone as his greatest asset, though he is also noted for his ability to maintain a consistent rhythmic pocket across diverse production styles.