Ninja Boy

After Saizou-Kabamaru's harsh grandfather and Iga ninja mentor-passes away, an elderly woman named Ran Ookubo reveals she received a letter from him asking her to look after his grandson. Kabamaru leaves with Lady Ookubo for Tokyo, eager to indulge in city life, devouring yakisoba, ramen, and chow mein while attending a seemingly ordinary school. But the school has its own strange surprises in store.