| Track Name | Track Artist | Album Artist | Album Name | Official Purchase/Artist Link | Album Genre | Source Track(s) |
|---|---|---|---|---|---|---|
| 少女救世論 (Acoustic Ver.) | Stack Bros. | 暁Records | 2021夏BOOTH限定おまけCD | Link | 少女綺想曲 ～ Dream Battle; 二色蓮花蝶 ～ Ancients; 春色小径 ～ Colorful Path | |
| KARMANATIONS (Acoustic Ver.) | Stack | 暁Records | 2021夏BOOTH限定おまけCD | Link | Reincarnation |