Tracks
| # | Title | Sung by | |
|---|---|---|---|
| 1 | やくそく | 鷲尾須美(CV:三森すずこ)、乃木園子(CV:花澤香菜) | 5:33 |
| 2 | ともだち (乃木園子ソロver.) | 乃木園子(CV:花澤香菜) | 4:53 |
| 3 | やくそく (Instrumental) | 鷲尾須美(CV:三森すずこ)、乃木園子(CV:花澤香菜) | 5:31 |
Source: MusicBrainz release group af18fd59-90cb-49a2-b89e-994bef9ac537 (CC0). Cover: Cover Art Archive.