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.

Alternative title:

• Nabari
• Nabari no Ō
  
• Ruler of Nabari
  

Episode titles:

• 1. The Awakened One
• 2. Raimei, Arrives
• 3. Assault
• 4. Ordered Mission
• 5. Greed
• 6. Choice
• 7. Heart's Decision
• 8. Inherited Spirit
• 9. Prelude Music
• 10. Polka・Raimei and Raikou
• 11. Curtain Call
• 12. Determination
• 13. The School That Doesn't Sleep
• 14. End of Night
• 15. Morning Parting
• 16. Foreign Guest
• 17. The Moment of Breakdown
• 18. The Voice that Calls Out
• 19. Profile of a Death God
• 20. Towards Togakushi
• 21. Ambition
• 22. Confusion
• 23. Invoke
• 24. Engetsurin
• 25. Futari
• 26. Connected Hearts