The Hanzo Academy is a prestigious prep school with a secret known only to a select few. Behind its walls is a training course for shinobi; trained spies and assassins that centuries ago had served the shoguns for their political and military needs. Today the tradition continues with five young female trainees with diverse personalities: the care-free Asuka, fierce yet perverted Katsuragi, the sweet and innocent Hibari, stoic and protective Yagyuu, and their mature, class representative, Ikaruga.

Follows the comical adventures of a mischievous yet artistic wolf [Volk], trying to catch a hare [Zayats]. The series has additional characters that usually either help the hare or interfere with the wolf's plans.

Takeru Yagi lives a normal, average life. He lives with his adoptive father Rokunosuke, and eats breakfast with two neighborhood girls, the sisters Asuka and Kotono. Takeru attends a kendo club at school with his best friend and rival Takeshi. It's an idyllic, peaceful life, where the greatest drama is whether Takeru or Takeshi will represent the school at the kendo tournament. Then one day, everything changes. Takeru and his friends are transported to a world like their own, yet fallen to ruin and filled with monsters. Moreover, people in strange clothes are highly interested in all of them.