While the day belongs to humans, the night belongs to yokai, supernatural creatures that thrive on human fear. Caught between these worlds is Rikuo Nura. He's three-quarters human, but his grandfather is none other than Nurarihyon, the supreme commander of the Nura clan, a powerful yokai consortium. So, Rikuo is an ordinary teenager three quarters of the time, until his yokai blood awakens. Then Rikuo transforms into the future leader of the Nura clan, leading a hundred demons.

Thanks to rumors, all of Tokyo is terrified of Rikuo, and wants him dead! But Rikuo's got other problems too. In Shibuya, a yokai is turning human girls into monsters. And he's got a special spell in store for Rikuo when he tries to stop him.