Vol.4 Haruka Nanase & Rin Matsuoka
SingleTracklist 27:49
| 1 | REAL WAVE | 4:35 | |
| 2 | Kitto Wasurenai | 4:29 | |
| 3 | Original Drama ～Haruka & Rin～ | 9:43 | |
| 4 | REAL WAVE (Off Vocal) | 4:34 | |
| 5 | Kitto Wasurenai (Off Vocal) | 4:28 |
| 1 | REAL WAVE | 4:35 | |
| 2 | Kitto Wasurenai | 4:29 | |
| 3 | Original Drama ～Haruka & Rin～ | 9:43 | |
| 4 | REAL WAVE (Off Vocal) | 4:34 | |
| 5 | Kitto Wasurenai (Off Vocal) | 4:28 |