A spin-off film directed by Kazuhiro Teranishi, depicting the events leading up to "TOKYO24." The story is set in Tokyo in 2025. Haruhiko Goto, a detective in the First Investigative Division, lost his mother to a lonely death in the past. Together with his junior detective, Tsuyoshi Tojo, he is assigned to the case of a woman's lonely death, but...
| Actor | Role |
|---|---|
 Teranishi YumaTsuyoshi Tojo | Tsuyoshi Tojo |
 Yusuke YamamotoHaruhiko Goto | Haruhiko Goto |
 Park Gyu-riAya Ando | Aya Ando |
| SShingo KazamiNintoku Sakakibara | Nintoku Sakakibara |
| MMasaru ShishidoNot listed | Not listed |
| SSIZUKUNot listed | Not listed |
| AAyaka SakumaNot listed | Not listed |
| HHiroomi ToyotaNot listed | Not listed |
| KKatsuya TakahashiNot listed | Not listed |
| MMiyata KazuhiroNot listed | Not listed |
| MMami OhsawaNot listed | Not listed |
 Ren KaburagiNot listed | Not listed |
 Ayu EnatsuNot listed | Not listed |
| GGintaro YajimaNot listed | Not listed |
| FFuyuyuki AsunaroNot listed | Not listed |
| AAkiyoshi SagawaNot listed | Not listed |