For high school student Ittoki Sakuraba, life totally changes when he learns about his hidden ninja legacy. His late father was the former head of the Iga ninja clan, his mother is the current clan head, and he’s the future head of the Iga clan. Now as the target of the rival Koga clan, he has no choice but to take the shinobi path and attend Kokuten Ninja Academy with his childhood friend and classmate, Kosetsu, who is also a female ninja guarding him, to prepare themselves for the impending conflict between the Iga and Koga clans.