| Name | Format | Duration | Size | Date | |
|---|---|---|---|---|---|
| BSO 1 - Bomb A Head ! Returns! (Opening).mp3 | MPG Layer 3 Audio File | 4m16s | 6MB | 2004-05-23 | |
| BSO 2 - Merry Merry Sweet Sweet Love.mp3 | MPG Layer 3 Audio File | 4m48s | 7MB | 2004-05-23 | |
| BSO 3 - Bomb A Head ! Returns ! (EXTENDED remix).mp3 | MPG Layer 3 Audio File | 5m13s | 8MB | 2004-05-23 | |
| BSO 4 - Eyes.mp3 | MPG Layer 3 Audio File | 5m7s | 7MB | 2004-04-12 | |
| BSO 5 - Aishite ne Motto (Ending).mp3 | MPG Layer 3 Audio File | 4m10s | 6MB | 2004-04-12 |