Nura

A supernatural saga of a 13-year-old by day, and a leader of a demon clan by night-straight from the pages of Weekly Shonen Jump!

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.

The yokai Hagoromo-Gitsune continues her attack to break the eight seals of Hidemoto. If she succeeds, the entire city of Kyoto will be under her full control. To save the city, Rikuo and his newfound allies, other trainee yokai that he's met in the city of Tono, will have to harness all the power they've learned and travel from the safety of Tono toward the ensuing fray in Kyoto!