Happiness〜Koufuku Kangei!〜 ハピネス～幸福歓迎！～
Released August 25, 2004 Editions 2 Tracks 2
Regular edition · Regular
| 1 | Happiness〜Koufuku Kangei!〜 | A-side |
| 2 | Yuujou Junjou oh Seishun | B-side |
| 3 | Happiness〜Koufuku Kangei!〜 (Instrumental) |
| 1 | Happiness〜Koufuku Kangei!〜 | A-side |
| 2 | Yuujou Junjou oh Seishun | B-side |
| 3 | Happiness〜Koufuku Kangei!〜 (Instrumental) |