Tracks
| # | Title | Sung by | |
|---|---|---|---|
| 1 | SERIOUS-AGE | 飛蘭 | 5:12 |
| 2 | spring～君とのメロディ～ | 飛蘭 | 4:32 |
| 3 | SERIOUS-AGE (off vocal) | 飛蘭 | 5:11 |
| 4 | spring～君とのメロディ～ (off vocal) | 飛蘭 | 4:29 |
Member reviews
Source: MusicBrainz release group b8a7b9cb-71e0-4743-9086-6f4c0dea175a (CC0). Cover: Cover Art Archive.