The Key Of The Goddess Gate

A key to the goddess gaye is the stone called sapphire and many creatures want it but one day at the sapphire kingdom one of the demon took the stone and headed to the forest to hide but he met a lady and make love.

They got a son name Zack but the baby Zack accidentally eat the key to the goddess gate and year passes and the sapphire completely became the part of his body.

One day, his parents gone and been killed by both angels and demons, he's being chased by a demon and been attack, he then gat hit on his head to cause him to got an amnesia.

Will he survive to this cruel world?