Azzy가 일본에서 발표한 데뷔 싱글입니다.
Tracklist
1. Let It Flow Feat. Keeproots, Saatan, N-Son, Cognito, Nachal from Garion, The Note, Taewan, Sahyang, P-Type, 39, Issac from Trespass, Hyun-Moo from Trespass, Squear from Vista Eternity, DJ It
2. Birth Day
3. Beauty In My Way
4. Star 15
5. Let It Flow Instrumental
6. Star 15 Instrumental
Azzy - Rock Spirit Rap System (2006)