Над альбомом работал композитор Takatsugu Muramatsu (Akai Ito No Onna Soundtrack, NHK Doyo Dorama Special Makete Katsu Sengo Wo Tsukutta Otoko Yoshida Shigeru, Mary and the Witch's Flower), а его релиз состоялся 4 марта 2026 года. На саундтрек попало 27 композиций общей длительностью около 60 минут. Подборка является компиляцией оригинальной музыки. Выпуском пластинки занимался лейбл テレビ朝日.
CD 1
| 1 | One in a Million: Tax Squad Main ThemeTakatsugu Muramatsu | 04:08 | |
| 2 | OfficeTakatsugu Muramatsu | 01:23 | |
| 3 | ExpertiseTakatsugu Muramatsu | 01:24 | |
| 4 | BreatherTakatsugu Muramatsu | 01:33 | |
| 5 | RemnantsTakatsugu Muramatsu | 01:33 | |
| 6 | DrollTakatsugu Muramatsu | 01:31 | |
| 7 | Explicit ConsentTakatsugu Muramatsu | 01:38 | |
| 8 | DubiousTakatsugu Muramatsu | 02:48 | |
| 9 | EchoesTakatsugu Muramatsu | 02:47 | |
| 10 | Under ScrutinyTakatsugu Muramatsu | 02:09 | |
| 11 | Tip-offTakatsugu Muramatsu | 01:50 | |
| 12 | VerificationTakatsugu Muramatsu | 01:55 | |
| 13 | PathosTakatsugu Muramatsu | 03:48 | |
| 14 | Thread of DoubtTakatsugu Muramatsu | 02:13 | |
| 15 | Light MomentTakatsugu Muramatsu | 01:34 | |
| 16 | Emerging OutlineTakatsugu Muramatsu | 02:16 | |
| 17 | Remnants -Piano Version-Takatsugu Muramatsu | 01:36 | |
| 18 | Lurking DarknessTakatsugu Muramatsu | 02:07 | |
| 19 | Shadow FiguresTakatsugu Muramatsu | 01:54 | |
| 20 | At the Breaking PointTakatsugu Muramatsu | 01:21 | |
| 21 | AfterglowTakatsugu Muramatsu | 02:30 | |
| 22 | Move InTakatsugu Muramatsu | 01:55 | |
| 23 | On the BrinkTakatsugu Muramatsu | 01:57 | |
| 24 | FrictionTakatsugu Muramatsu | 02:38 | |
| 25 | The Way BackTakatsugu Muramatsu | 03:17 | |
| 26 | Unfading ShadowTakatsugu Muramatsu | 02:51 | |
| 27 | One in a Million: Tax Squad Main Theme -Piano Version-Takatsugu Muramatsu | 03:14 | |
