She was destroying people… in her mind. Kiho Ishiguro is a high school girl who's an honor student at school, and devotes herself to her disabled mother at home. She is quiet and gentle, but deep down inside she has always had the urge to "hit someone." As her feelings gets stronger day by day, Kiho encounters a street criminal. She snaps and unleashes her rage on the bad guy without restraint…? Here comes the JK who will revolutionize the world of women's MMA! (Source: Kodansha, translated)

A martial arts champion is merely someone who has reached the top within the bounds of rules.The true strongest is someone who has reached the top in a "fight" with no rules at all!! A delinquent boxing unfolds place at the worst delinquent high school, where a battle for the top spot unfolds with just his fists!!