Reiko and Junko, both in their sophomore year of high school, set out to fight malevolent forces that include villains, ninjas, yakuza, and corruption. Upon arriving at a new academic institution, they uncover a secret ninja organization, an unscrupulous superintendent, and a tragic incident from long ago. With the help of Kotetsu, a skilled ninja, they correct the injustices present at the school. Nevertheless, their pursuit results in leaving a path of sorrow behind them.