Young Yakuza successor Hidemaro Gokukouji (Hiroyuki Onoue) runs into thugs from Kanto Gogakuren while partying, but is saved by Momotaro Tsurugi (Tak Sakaguchi).

At the enrollment ceremony, Hidemaro is assaulted by the head instructor Oni-Hige (Shun Sugata) for not getting into line properly.

After he finds Momo and meets Togashi, Oni-Hige introduces the principal, Heihachi Edajima (Akaji Maro).

After finding a pair of underwear, drill instructor Iron Helmet (Kentarō Shimazu) summons all the students for a uniform inspection.

After words of encouragement from Shioya (Tatsuo Yamada), the last remaining member of the Gokukouji clan, he returns to Otokojuku just as Momo is being scolded by Oni-Hige for letting him escape.

He and his two right hand men, Hien (Gō Ayano) and Gekko (Shuya Yoshimoto) defeat most of the students.

As Momo trains his sword, Toramaru wrestles a bear, and Matsuo practices his ōendan, Hidemaro and Tazawa both wonder what they can do to help.