| Track Name | Track Artist | Album Artist | Album Name | Official Purchase/Artist Link | Album Genre | Source Track(s) |
|---|---|---|---|---|---|---|
| NIGHTMARE countdown (ver.花たん) | Tsuyo-B | K2E†CradleCrazy Beats | 冬コミ限定特典CD | Link | Eurobeat | U.N.オーエンは彼女なのか？ |
| 夜乃風車 (ver.つぅ) | Tsukasa | K2E†CradleCrazy Beats | 冬コミ限定特典CD | Link | Eurobeat | 妖魔夜行 |