Osaka Tough Guys

Makoto Fukunaga and Eiji Yamada rescue a girl named Keiko from an attempted gang attack. The incident leads to both boys being expelled from Tsutenkaku High for fighting. The ordeal sets in motion their uneasy alliance with the yakuza underworld.

Before leaving the school, Makoto and Eiji threaten to expose the administration's secrets and ruin the school's reputation. They demand one million yen as a parting gift in exchange for silence. The administration complies, fueling their hunger for more reckless power.

That night they trail the boss of the Kinsu sect into an expensive hostess club. They end up spending all of the money they took, blowing through the million yen in short order. The spree marks a turning point, pulling them deeper into the yakuza underworld.

The next day they respond to a job listing from Takaranoyama Trading Ltd, offering 500,000 yen per month to young men with no experience. They are forcibly conscripted into the Kinsu sect through contracts signed in blood. Tokichi Kinoshita, a student of animal husbandry at Yamanosato University, is recruited but never invited to participate in the other yakuza activities.

Makoto, Eiji, and Tokichi Kinoshita sign binding contracts that force them into the Kinsu sect. They quickly realize the recruitment is coercive and designed to control their lives. This marks their descent into the world of organized crime.

Head Captain Kaizo Daimon tries to help them obtain money through collision insurance fraud. The plan goes awry when their attempt ends in a collision with a police car. The near-disaster heightens the sense that their luck is running out.

Sabu pawns his own gold-plated Kinsu sect badge, along with Makoto's and Eiji's badges, to pay off the debt from their failed used panties business. The act shows how quickly their criminal schemes compound their problems. Without the badges, they lose a degree of protection in the underworld.

At a hostess bar, Makoto meets Keiko as she leaves work and walks her home. She tells him about a film she will star in, hinting at her rising ambition and danger ahead. The encounter deepens their bond and foreshadows future trouble.

Daimon and the Asashi sect boss engage in a karaoke competition over a hostess named Akemi. During the night, Daimon notices an advertisement for a pornographic film starring Keiko. The revelation ties Keiko's fate to the sect's illicit business.

Sabu informs Makoto that 7 Star Productions is a front for the Asashi sect that produces porn. This revelation uncovers the true purpose behind the last few assignments. It heightens the urgency to protect Keiko.

Makoto and Eiji race to the film set, where Daimon realizes the actress is not there willingly. They beat up the Asashi sect members and rescue Keiko. The rescue solidifies their defiance against the sect.

Hosoda of the Asashi sect calls Amachi and demands a finger from Makoto and a finger from Eiji as well as monetary compensation as an apology. Daimon asks to settle the dispute and the big boss allows it. Tensions spike as violence seems inevitable.

Daimon, Makoto, and Eiji confront the Asashi and Daimon threatens the Asashi boss with fake dynamite he obtained from Kinoshita. The boss withdraws the demand for the finger and compensation. The bluff tests their nerve and cements their reputation.

The dynamite ends up being real and explodes, yet the trio is tough enough to survive the blast. The explosive confrontation marks a brutal capstone to their showdown with the Asashi sect.