Each girl has at least one secret. Rikka, Chiyo, Sekine, and Tsubasa are four good friends in the same class. But each one has a ridiculous secret…!?

When a vicious Youma attacks Tsukasa, a pink-clad kunoichi named Shizuri swoops in to save the ordinary salaryman. She says she’ll protect him from further attacks, but there’s a catch: Shizuri wants to move…

After surviving an attack from the rival Kouga clan, Ittoki Sakuraba, an ordinary boy, discovers that he is the 19th heir of the Iga ninja. Ittoki learns to become an…