Rokujou Miharu is a boy who has a hijutsu (hidden technique) living inside of him. This hijutsu is the power of creation. Many ninja clans are seeking it as the one who possesses it becomes the ruler of the ninja world. Rokujou's classmate Kouichi started a nindou ("Way of the Ninja") club at school with Kumohira, his English teacher. Both Kouichi and Kumohira are secretly ninjas. They tried to persuade Rokujou to join the ninjutsu club. At first, he was reluctant, but after being attacked by group of ninjas trying to get his hijutsu, he joins. He must become the Ruler of Nabari in order to survive.
even though it's about the secret world of ninjas, this anime is more like a drama and concentrates mostly on relationships (non-romantic) and self worth. there's not a complex plot and the ending feels almost lacking: the ending was peaceful but sad. the fight scenes aren't extraordinary in any way but like i said, it's more like a drama. the animation is very good (everyone is attractive). the humor is light but almost nonexistent. what captured me is the struggles (psychological/physical) of the anti-hero.