Takashi Kamiyama has enrolled in Cromartie High School, known for its rough characters and rowdy demeanors. As a "rabbit among lions," Kamiyama will get a crash course on what it means to be tough, and why nicknames and having a strong back are of vital importance.

Having scoped out the strongest badasses in Cromartie, Kamiyama and Hayashida can't let one thing go: the true nature of Mechazawa. Watching from afar, they silently wish someone, anyone, would say what is on both of their minds.

It begins in a bathroom. A wordless tune, hummed on lips of metal. Stuck in Hayashida's mind, he takes it to the rest of the Cromartie boys, and soon everyone is humming it.

As leader of Destrade Tech's first year delinquents, Yamaguchi has but one thing he won't tolerate: bad comedy.

Takenouchi, the boss of the Cromartie first years, finally makes his appearance. As boss, he can't show any weaknesses. It's just a shame his biggest weakness is so common!

Takeshi Hokuto, the son of a powerful man, has brought eighteen other high schools under his control, and now it's Cromartie's time to feel the power of the Hokuto. There's just one problem: they're all idiots.