All Miharu Rokujou wishes for is a simple life. Unfortunately, he soon learns that he is in possession of a sacred and secret ninja art, the "Shinra Banshou." With this ability, Miharu is more likely to become the king of the hidden world, Nabari, than remain a normal high school student! He must also deal with daily attempts against his life and, ironically, his sensei's efforts to convince him to join the nindo club.

Having this "omnipotent" ability will test Miharu's chances of survival, and the world of Nabari is his only hope.