Hakuō Academy used to be a prestigious high school, and famous for martial arts. However, because its rival school Seishikan has been cowardly luring its superior students, Hakuō was going to decline. In order to recover from the situation, the acting principal of Hakuō; Himeko Hōjō, sends Ranko Yagyū to the Fūma village in search of the famous Fūma ninja clan for assistance. The leader of the Fūma sent Kojirō to Hakuō, there he faces the notorious Yasha clan who fights for Seishikan led by Musashi Asuka. Kojirō's comrades arrive, resuming an all-out ninja war that began five centuries ago.