Workaholic (feat. ASH ISLAND) Credits Written by 황세현, ASH ISLAND Composed by TOIL, 황세현, ASH ISLAND Arranged by TOIL Drum, Percussion by TOIL Bass by 정승현 Synths by TOIL Keyboard by 박병일 Guitar by 정경환 Chorus by 황세현 Produced by 황세현, Andnew, l0stisland Recorded by 황세현 Mixed by Andnew @salpotstudios 살폿스튜디오 Mastered by 권남우 @ 821 Sound Mastering Photography by Hidongki