| # | Title | Duration | |
|---|---|---|---|
| 1 | Natsu no Yume | 4:18 | |
| 2 | WALK (movie ver.) | 3:44 | |
| 3 | Natsu no Yume (cold water remix) | 3:21 | |
| 4 | Black Rover (city raven remix) | 4:13 |
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| # | Title | Duration | |
|---|---|---|---|
| 1 | Natsu no Yume | 4:18 | |
| 2 | WALK (movie ver.) | 3:44 | |
| 3 | Natsu no Yume (cold water remix) | 3:21 | |
| 4 | Black Rover (city raven remix) | 4:13 |