Rikuo Nura lives in Ukiyoe Town and looks like your typical junior high student. But unlike his classmates, he lives in an old, Japanese-style house full of yokai that serve him. Unbeknownst to many, Rikuo is the grandson of Nurarihyon, who is the leader of all yokai. Rikuo is regarded as the Third Heir of the Nura Clan, but he has yet to officially take his seat.
For Japanese mythology lovers, this show is for you! This show follows the adventures of a junior high student who has a split personality, one being a timid student, the other a powerful yokai (Japanese Demon). He is the heir to the family and has to battle all sorts of monsters, demons and other bad yokai in order to live in harmony with the human world. The show ends earlier than it should (but is still plenty long at 52 episodes), and the first season is okay, but the second season really shines and makes the show really great.
You can watch the series on Hulu.