Kasumi Kogen, the so called Village of Mist, is a town located somewhere in a tasteful and rural place in Japan. In this town, there is a training school. Surprisingly, it is the Sinobi Gakuen, a training school of kunoichi, or the female ninja. It gathers competent students from all over Japan to train them to become kunoichi. Needless to say, the villagers are alumni of the school, and they run and jump, appear and disappear, as if the whole town were a big ninja house.
To this strange town, there came a girl and a man. The girl is Himawari who wants to be a ninja and respect Ichikawa Raiso as her master, and she came here to enter Shinobi Gakuen. The man is a new assigned teacher Marikoji Hayato. He was deceived into paying money and came here to repay his debts.
They encounter in this Village of Myst. Whether their encounter is by chance or inevitable? A teacher and his student. Forbidden Love? Other students like Azami, Skimi, Himeji, Yusu wait and see their situation secretly.
Whether can Himawari become a full-fledged Kunoichi?
Whether can she protect her master?