Kunitoshi Joukyuu is a lazy ass, good for nothing pervert. Who also happens to be a supposed genius master of Aikido, the strongest in the world, if not because his father sealed away most of his abilities before dying.

So now he's stuck trying to find a way to rid himself of the "curse" that had been put on him all the while getting involved in fights with beautiful high-school girls who are a part of a power-struggle over a school. But none ever suspected the true sadistic monster that hides underneath the calm and bored face he usually wears. Who will be in greater trouble? The girls, or Joukyuu?