Although there is little information about Plaid, the main composer of "Bad Boy", and there are few comments from the industry, it is inferred that he should be a music expert familiar to 4℃ Studio. The music sets off the atmosphere just right and adds a lot to the film. The audition track is the ending song Bonus Track sung by the Asian Kung Fu Generation band.
Album tracks:
01. Plaid - This City [7:24]
02. Plaid - Rat's Step [4:59]
03. Plaid - This City is Hell [2:49]
04. Plaid - Brothers Chase [5:10]
05. Plaid - Butterfly [3:07 ]
06. Plaid - Oasis [2:45]
07. Plaid - Beginnings [3:22]
08. Plaid - Snakeing [3: 10]
09. Plaid - Open Kastle [4:14]
10. Plaid - Assassouts [4:55]
11. Plaid - Safety in Solitude [4:19]
12. Plaid - Where? [5:30]
13. Plaid - White's Dream [6:35]
14 . Asian Kung Fu Generation - Bonus Track [4:23]