| Track Name | Track Artist | Album Artist | Album Name | Official Purchase/Artist Link | Album Genre | Source Track(s) |
|---|---|---|---|---|---|---|
| Scarlet in the darkness | いっちー | Holiday Laboratory | CLEAN | Not Available | 亡き王女の為のセプテット | |
| 輪 -ＲＩＮ- お燐 | いっちー | Holiday Laboratory | LEGEND | Not Available | 死体旅行 ～ Be of good cheer! | |
| 夢街道五十三次 | いっちー | Holiday Laboratory | LEGEND | Not Available | レトロスペクティブ京都 | |
| 龍臥橋滴る雨露の恩 | いっちー | Holiday Laboratory | LEGEND | Not Available | 少女綺想曲 ～ Dream Battle |