This is the tale of a young child who was fostered by a magical creature while growing up unaware of his true identity. It is the boy's adventure to discover who he was and where he came from.

The demon king and his family were killed in the carnage that took place at the demon castle, but the demon king's son "Leo moonlight" unexpectedly survived. "You awful demigods I'm going to murder you all. All of you demigods are going to be killed by me. I'm going to kill you and take away y...