Seven high schools in the Kanto region are in fierce competition to establish dominance, each representing a legendary warrior from the Three Kingdoms era. Hakufu Sonsaku, a student at Nanyou Academy, faces a greater challenge as she is destined to be slain by merciless Ukitsu, despite her exceptional martial arts skills. To safeguard her, her mother entrusts Koukin Shuuyu, her cousin, with this daunting responsibility. However, this task is complicated by Hakufu's explosive temper that unleashes overwhelming power that she cannot control. With the help of Nanyou's "Big Four," Hakufu and Shuuyu must thwart their rival schools' plans and uncover the true nature of Hakufu's abilities before they run out of time.