Chronicles of Aria - The Child of Prophesy

The Holy War between Celestial Clan and Archfiend Clan ended. But they all fell into the world of men, Midgard. Now, the Celestial Clan plans to return to the Heavenly Realm as well as the Archfiend Clan to take revenge on the Great Creator. What will happen to the people along with the Celestial and Archfiend?