Cromartie High School was a place where population was 100% delinquent, until it suddenly became 1% less. Takashi Kamiyama, is a mild-mannered above-average student, who enrols in the school and regularly writes to his mother about his current student life at school. You’d think that he be bullied non-stop for the rest of his life right? Wrong! As twisted as the logic seems, everyone thinks he is the baddest bad guy in the school, for “only a really tough rabbit would lie down among lions”. As everyone has an average IQ of 50, which is quite low, only hilarious laughs and situations will follow.