Kiryuuden

A demon who has forgotten about himself and his past memories meets Koma, a fluffy guardian dog. It is said that demons are born from the grudges of humans, but the protagonist has no memory of his time as a human. The protagonist, who has been given the name "Oniyasa" is a gentle demon, and goes on a journey with Koma to find his parents.

(Source: Natalie, translated)