Miharu Rokujou simply desires an ordinary life. Unfortunately, he soon discovers that he possesses a sacred and secret ninja technique known as the "Shinra Banshou." With this power, Miharu is more likely to become the king of the hidden world, Nabari, than to remain a typical high school student! He must also cope with daily assassination attempts and, ironically, his sensei's efforts to persuade him to join the nindo club. Possessing this "omnipotent" ability will test Miharu's chances of survival, and the world of Nabari is his only hope.