Tracks
| # | Title | Sung by | |
|---|---|---|---|
| 1.1 | 蛍火 | RYTHEM | 4:39 |
| 1.2 | 夏メロ | RYTHEM | 4:59 |
| 1.3 | 蛍火 (Instrumental) | RYTHEM | 4:37 |
| 1.4 | 夏メロ (Instrumental) | RYTHEM | 4:54 |
| 2.1 | 蛍火 (Video Clip) | RYTHEM | |
| 2.2 | 蛍火 (Video Clip Making) | RYTHEM |
Source: MusicBrainz release group d88e33d8-2abd-3e31-ab73-099255664e26 (CC0). Cover: Cover Art Archive.