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Disc1
| 1 | Irony (아이러니) | Wonder Girls | 4:04 |
| 2 | Bad boy | Wonder Girls | 3:10 |
| 3 | 미안한 마음 | Wonder Girls | 3:59 |
| 4 | Irony (Tae Kwon-Daybreak Remix.) | Wonder Girls | 3:57 |
| 1 | Irony (아이러니) | Wonder Girls | 4:04 |
| 2 | Bad boy | Wonder Girls | 3:10 |
| 3 | 미안한 마음 | Wonder Girls | 3:59 |
| 4 | Irony (Tae Kwon-Daybreak Remix.) | Wonder Girls | 3:57 |