Tracks
| # | Title | Sung by | |
|---|---|---|---|
| 1 | hollow | rhu | 4:21 |
| 2 | 僕たちの未来 | rhu | 4:58 |
| 3 | hollow (instrumental) | NUMBER 201 feat. rhu | 4:21 |
| 4 | 僕たちの未来 (instrumental) | NUMBER 201 feat. rhu | 4:56 |
Member reviews
Source: MusicBrainz release group 26fa3772-5b6f-369d-bbe4-27f015e36cc4 (CC0). Cover: Cover Art Archive.