Taiga Banjou is a man who knows exactly how to handle the trash. For years, he lived as the ultimate weapon for the Yamada-gumi, an elite assassin raised in the cold heart of the underworld. But times have changed. The legendary era of the Gokudou is fading into history, and his former family has been forced to rebrand as a legitimate corporation. Now, the man who once cleared out rival gangs has a new title: school janitor.

It was supposed to be a simple, quiet life. Taiga is under strict orders to stay out of trouble and maintain his reputation as a law-abiding employee. But the high school he is assigned to is anything but peaceful. It is a breeding ground for rampant bullying, substance abuse, and unchecked delinquency that has the faculty paralyzed with fear. These students think they are the toughest things on the streets, but they have never met a professional from the real underworld.

Taiga might be forbidden from killing now that he is a respectable member of society, but he has not forgotten how to clean up a mess. Using the lethal instincts and tactical precision he perfected in the shadows, he is about to show this school what true discipline looks like. When the system fails and the teachers turn a blind eye, the janitor takes out the garbage. Get ready for a high-stakes action drama where the hallways become a battlefield and a former killer becomes the unlikeliest mentor of all.

Action, Drama, Yakuza, School Life, Delinquents, Martial Arts, Underworld, Seinen, Redemption, Combat