| # | Nimike | Esittäjä | |
|---|---|---|---|
| 01 | Happy Days |
Ai Otsuka
|
|
| 02 | Hoshikuzu 星くず |
Ai Otsuka
|
|
| 03 | Happy Days (Instrumental) |
Ai Otsuka
|
|
| 04 | Hoshikuzu (Instrumental) 星くず (Instrumental) |
Ai Otsuka
|
|
| DVD-01 | Happy Days (MUSIC CLIP) |
Ai Otsuka
|
