| Title | Artist | Time | |||
|---|---|---|---|---|---|
| 1 | Hidamari No Michi | Kobukuro | 5:33 | ZAR Album Only | |
| 2 | Best Friend | Kobukuro | 4:33 | ZAR Album Only | |
| 3 | Siren | Kobukuro | 5:12 | ZAR Album Only | |
| 4 | Hidamari No Michi (Instrumenta | Kobukuro | 5:33 | ZAR Album Only | |
| 5 | Best Friend (Instrumental) | Kobukuro | 4:33 | ZAR Album Only | |
| 6 | Siren (Instrumental) | Kobukuro | 5:09 | ZAR Album Only |
