

Great Master Otomo is visiting Shuriken School, and holds a conference about the ancient art of eating rice balls. The class is bored silly and the Principal watches Otomo gulp down one rice ball after the other with suspicion. When Otomo sees that neither class nor teachers are interested, he announces that a Great Philosopher living up in the mountain above the town handed on this precious knowledge, which has enabled the hermit-philosopher to live over 300 years! The students, impressed, clamour to meet him.
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!