Nurarihyon no Mago

Rikuo Nura, a kid that is part human and a quarter youkai (demon), lives in a house full of spirits along with his youkai grandfather. Trying to escape his fate of acting like a demon, he does good deeds in order to avoid becoming one despite his grandfather's wish to succeed him as master of the Nura youkai clan. First published as a oneshot in 2007, it later became a series in 2008.