Tracks
| # | Title | Sung by | |
|---|---|---|---|
| 1 | ハピネス (スマイル・バージョン) | AI | 4:23 |
| 2 | ハピネス | AI | 4:17 |
| 3 | Happiness (English Version) | AI | 4:16 |
| 4 | ハピネス (Reggae Summer Remix by Mighty Crown) | AI, Danny Bassic | 5:03 |
| 5 | ハピネス (Live in Budokan) | AI | 5:28 |
| 6 | ハピネス (Karaoke Mix) | AI | 4:17 |
Member reviews
Source: MusicBrainz release group 95cfe8d9-bf22-4e47-b229-a0168f8aed2e (CC0). Cover: Cover Art Archive.