잿빛도 색이다. ■ 크레딧 01. Travel Produced by Quacy / Lyrics by Quacy, Taegi / Recorded by Quacy, Taegi Vocal by Quacy, Taegi Mixed by Quacy 02. I Don't Know Produced by Quacy / Lyrics by Quacy, Taegi / Recorded by Quacy, Taegi Vocal by Quacy, Taegi Mixed by Quacy 03. What Is Love Produced by Quacy / Lyrics by Quacy, Taegi / Recorded by Quacy, Taegi Vocal by Quacy, Taegi Mixed by Quacy 04. Spring Produced by Quacy / Lyrics by Quacy, Taegi / Recorded by Quacy, Taegi Vocal by Quacy, Taegi Mixed by Quacy [ALBUM CREDIT] Excutive Producer : Quacy, Taegi Mix & Mastering Engineer : Quacy Art Design : Quacy