Natsuki is the leading female karate practitioner at her high school. Beautiful and cheerful, she charms most of the people she meets. Most of the young men in her class would dearly like to be the object of her affection, but she reserves her passion for karate. Unfortunately, all the big, ugly thugs she encounters want to fight her, so she is always finding practical application for her karate skills. As the series continues and her opponents become grimmer, Natsuki learns techniques from Aikido and Judo and develops a special Ki energy blast that doubles the strength of her punches. She may not be able to smash walls like some of her opponents, but her special N.G. Bomber usually sends her opponents flying.