Tracks
| # | Title | Sung by | |
|---|---|---|---|
| 1 | Let's HappiecE Life! | 3B LAB.☆ | 4:56 |
| 2 | 最後によかった | 3B LAB.☆ | 5:55 |
| 3 | Let's HappiecE Life! ～Unplugged～ | 3B LAB.☆ | 6:18 |
Source: MusicBrainz release group 12a1e18c-4437-3476-a31c-81b95c71853d (CC0). Cover: Cover Art Archive.
| # | Title | Sung by | |
|---|---|---|---|
| 1 | Let's HappiecE Life! | 3B LAB.☆ | 4:56 |
| 2 | 最後によかった | 3B LAB.☆ | 5:55 |
| 3 | Let's HappiecE Life! ～Unplugged～ | 3B LAB.☆ | 6:18 |
Source: MusicBrainz release group 12a1e18c-4437-3476-a31c-81b95c71853d (CC0). Cover: Cover Art Archive.