why
SingleTracklist 29:10
| 1 | why | 5:51 | |
| 2 | wonderful world | 4:56 | |
| 3 | why (CASSETTE VISION remix) | 6:11 | |
| 4 | wonderful world (KREVA remix) 平井堅 feat. KREVA from KICK THE CAN CREW | 6:24 | |
| 5 | why (less vocal) | 5:48 |
| 1 | why | 5:51 | |
| 2 | wonderful world | 4:56 | |
| 3 | why (CASSETTE VISION remix) | 6:11 | |
| 4 | wonderful world (KREVA remix) 平井堅 feat. KREVA from KICK THE CAN CREW | 6:24 | |
| 5 | why (less vocal) | 5:48 |