

The Principal is happy. A wealthy man is considering placing his son, Kazumi, in Shuriken School, along with a huge cheque, which would put an end to the school's financial dilemma. But first, the boy will spend a day at the School, to see if he likes it. Kazumi seems to appreciate Eizan, so the Principal puts him in charge of looking after the boy. But Kazumi is so spoiled rotten, that soon everyone avoids them (even Eizan's friends avoid him). The teachers themselves threaten to resign. Eizan feels miserable. When the Katana kids jump in and kidnap the boy, Eizan is faced with a choice. What if they just keep him? Well...perhaps not.
Bakufu, the famous Ninja master, literally drops out of sky (hence the hole in the school's roof) and offers to teach at Shuriken School. The Principal doesn't dare refuse, but Bakufu's fee is exorbitant.
As the School prepares to celebrate the anniversary of the town's foundation, a mysterious Ninja from Katana School makes off with Tokiro's (the city's father) famous flip-flops. According to tradition, Shuriken presents these flip-flops to the public during the commemorative parade. If Shuriken School cannot produce them, the school's entire assets will be handed over to Katana School!