Nurarihyon No Mago [Manga]

The manga is about Rikuo Nura, a kid that is 3/4 human and 1/4 youkai. He lives in a house full of spirits alongside his grandfather who is the leader of the youkai. Rikuo is destined to take over his grandfather leadership but his human side has no interest. Rikuo is just a normal kid who has no interest to become the leader of youkai