HAPPY 7 DAYS
SingleTracklist 24:16
CD 1
| 1 | HAPPY 7 DAYS | 3:31 | |
| 2 | SUMMER SUMMER SUMMER | 4:27 | |
| 3 | シ、グ、ナ、ル。 | 4:10 | |
| 4 | HAPPY 7 DAYS (Instrumental) | 3:31 | |
| 5 | SUMMER SUMMER SUMMER (Instrumental) | 4:27 | |
| 6 | シ、グ、ナ、ル。 (Instrumental) | 4:08 |
DVD-Video 2
| 1 | HAPPY 7 DAYS (Music Video) | ||
| 2 | HAPPY 7 DAYS (Dance Shot Ver.) |