Bad Girl (Japanese Ver.)
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Disc1
| 1 | Bad Girl (Japanese Version) | BEAST | 3:12 |
| 2 | Mystery (80KIDZ Remix) | BEAST | 4:25 |
| 3 | Easy (Sincere Version) | BEAST | 3:42 |
| 1 | Bad Girl (Japanese Version) | BEAST | 3:12 |
| 2 | Mystery (80KIDZ Remix) | BEAST | 4:25 |
| 3 | Easy (Sincere Version) | BEAST | 3:42 |