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Disc1
| 1 | Rainbow (Original Mix) | Sowelu | 4:35 |
| 2 | Breath 〜想いの容量〜 | Sowelu | 4:58 |
| 3 | Rainbow (Chinese Flavor Mix) | Sowelu | 4:11 |
| 4 | Rainbow (Less Vocal) | Sowelu | 4:36 |
| 5 | Breath 〜想いの容量〜 (Less Vocal) | Sowelu | 4:55 |
| 1 | Rainbow (Original Mix) | Sowelu | 4:35 |
| 2 | Breath 〜想いの容量〜 | Sowelu | 4:58 |
| 3 | Rainbow (Chinese Flavor Mix) | Sowelu | 4:11 |
| 4 | Rainbow (Less Vocal) | Sowelu | 4:36 |
| 5 | Breath 〜想いの容量〜 (Less Vocal) | Sowelu | 4:55 |