The Little Prince and the Eight-Headed Dragon

Susanoo is the youngest son of Izanagi and Izanami, a god and a goddess that created Earth so that people could live and try to be happy. Still a young boy, Susanoo is devastated by the passing away of his mother. Determined to find her despite the reprimands of his father, he embarks on a journey to find his brother and his sister since they might know how to get to the place their mom has gone to. (animenewsnetwork.com)