| Track Name | Track Artist | Album Artist | Album Name | Official Purchase/Artist Link | Album Genre | Source Track(s) |
|---|---|---|---|---|---|---|
| TILL WHEN | HIDDEN TREASURE | HIDDEN TREASURE | Beyond Living Doubt | Link | 広有射怪鳥事 ～ Till When? | |
| ビヨンド・リビング・ダウト | HIDDEN TREASURE | HIDDEN TREASURE | Beyond Living Doubt | Link | 六十年目の東方裁判 ～ Fate of Sixty Years | |
| 空は寂しい | HIDDEN TREASURE | HIDDEN TREASURE | Beyond Living Doubt | Link | 春の湊に |