Tracks
| # | Title | Sung by | |
|---|---|---|---|
| 1 | Happiness!!! | 木村カエラ | 5:00 |
| 2 | Untie | 木村カエラ | 4:32 |
| 3 | Happiness!!! (Instrumental) | 木村カエラ | 5:00 |
| 4 | Untie (Instrumental) | 木村カエラ | 4:28 |
Source: MusicBrainz release group bf7155ce-09a4-30b0-9dee-fd2b38995c1c (CC0). Cover: Cover Art Archive.
| # | Title | Sung by | |
|---|---|---|---|
| 1 | Happiness!!! | 木村カエラ | 5:00 |
| 2 | Untie | 木村カエラ | 4:32 |
| 3 | Happiness!!! (Instrumental) | 木村カエラ | 5:00 |
| 4 | Untie (Instrumental) | 木村カエラ | 4:28 |
Source: MusicBrainz release group bf7155ce-09a4-30b0-9dee-fd2b38995c1c (CC0). Cover: Cover Art Archive.