To increase the school's income, the Principal has accepted to house three young stars from the music industry in need of calm and tranquillity. The atmosphere at Shuriken is morose. The stars snub their hosts, their manager is unbearable, and the gym is out of bounds for the budding ninjas. Outside, fans, photographers and TV production vans have flocked in, as if by miracle. Shuriken resembles a besieged fort. The Principal announces to Eizan, Okuni and Jimmy that they are about to carry out their first true ninja mission...