Anri Nakazato lives in a dojo, and so she's been learning martial arts since she was very young. Thanks to her strict upbringing, she has a deep hatred of injustice and impropriety. Joining the school morals committee was a natural fit, of course, but it hasn't made her very popular. Especially not with the school hooligans. One day on patrol, she finds a mysterious hole. ALL the delinquents must be using it to do... something delinquency, she reasons. Thus she crawls inside... but it's a bit smaller than she thought. Now she's stuck in quite an embarrassing predicament, and the school troublemakers have found out! Uh oh, Anri!