Taken under the wing of Turtle (Yûsuke Kawazu ), Nanbu is taught how to fight through an elaborate training regimen. He then joins a school gang, the OSMS. A conflict between gang leader Takuan (Mitsuo Kataoka) and Turtle ensues concluding with Nanbu's usurpation of OSMS leadership. Setting a more aggressive manifesto of actively breaking all school rules, and avoiding girls entirely, he has a run-in with the school drill sergeant and is suspended. Turtle speaks to the school administration on Nanbu's behalf resulting in both students fleeing Okayama, leaving Michiko behind.