A group of high school students wearing school uniforms went to Tokyo and began calling themselves the Kuroseigi. The Kuroseigi enjoy fighting. They abduct Mina and run away from the scene. Although the kidnapped Mina was rescued from the hands of the Kuroseigi, Tsukio, Reiichi, and Shinnosuke are soon overwhelmed by the growing number of Kuroseigis. All the while, the man with a dignified look sitting in the cafe happens to be the president of Kuroseigi, Kinjuiro Kitaeda, also known as "Kin-chan. Finally, Maki arrives to find Mina! At last, the fight of Kuroseigi versus Maki starts!