The life of Azusa takes a drastic turn when she finds the corpse of her sister Megumi, with the words "female pig" burned into her skin. Having thought that the name "Kuni" refers to nothing more than an urban myth, Azusa comes to realize that the perverted fighter of perversion is very real. With the help of her classmates, she decides to track down that man and avenge the victims of his Stop the Bitch Campaign!