The stage of this work is Saitama, a suburb of Tokyo in the early Heisei period. Immediately after the bubble burst gangster countermeasures law, there were gangsters who defended the last territory and young people who freely controlled the city. The youth conflict escalated day by day and became a force that surpassed the yakuza, and the runaways were sent to juvenile prisons one after another, where exclusive rules awaited.
Unfortunately the movie Gray Wall Gear is not yet available on HBO Max.
| Directing | Kozo Ando | Director |
| Production | Kozo Ando | Producer |
| Writing | Anso Koyaji | Screenplay |
| Writing | Toru Asahina | Screenplay |
