(Y/N) is a human girl who used to live an ordinary life. One day, her town is under attack by the Underworld Army, and they are after a valuable object, the ivory key, which could possibly devastate the world. An angel from Skyworld, Pit, tries to take down the Underworld Leader, Hades, to prevent him from taking it. However, (Y/N) accidentally intervenes the fight and the key falls into her hands. The key becomes molecularly scattered and transfers inside (Y/N)'s heart. To prevent the Underworld Army from killing her for the key, she and Pit go on a journey to find the three rings of divinity. This is a preview of my upcoming fanfiction. It will only consist of two chapters. Changes will be made on my update version.