| Track Name | Track Artist | Album Artist | Album Name | Official Purchase/Artist Link | Album Genre | Source Track(s) |
|---|---|---|---|---|---|---|
| 紅空舞踏 | hiroshi | R／K Project | Crimson Septet | Link | ほおずきみたいに紅い魂 | |
| Thorn an Walker | keeth | R／K Project | Crimson Septet | Link | 妖魔夜行 | |
| No continue ! | Raiki | R／K Project | Crimson Septet | Link | U.N.オーエンは彼女なのか？ | |
| Gatekeeper | hiroshi | R／K Project | Crimson Septet | Link | 上海紅茶館 ～ Chinese Tea | |
| Life Stream | keeth | R／K Project | Crimson Septet | Link | おてんば恋娘 | |
| Crimson Septet | Raiki | R／K Project | Crimson Septet | Link | 亡き王女の為のセプテット |