A yankee high school where problem children from all over the country gather. Ichinose, a student there, is competing with his rival Aikawa for the top spot. One day, Ichinose challenges him to a fight to settle things. However, Aikawa ignores the fight and goes to feed his "cats." Ichinose becomes even more angry at the unexpected reason and finally tries to seriously crush Aikawa... but at that moment!! Something strange happens to his body...!? 全国の問題児が集うヤンキー高校。 そこに通う一之瀬（いちのせ）は、ライバルの愛川（あいかわ）とトップの座を争っていた。 ある日、決着をつけようと喧嘩を挑んだ一之瀬。 しかし愛川は勝負そっちのけで「ねこちゃん」の餌やりに行ってしまう。 思いもしなかった理由に、ますます怒りを募らせた一之瀬は ついに本気で愛川を潰そうとする…が、その時！！何やら身体に異変が…!?