Imagine a place beyond dreams and reality, beside God Himself. A place where every wish, every desire comes true, and where there is no sorrow. Sounds wonderful, doesn't it? But can those living in Heaven even feel fear? Who could have known that the gates of Hell were hidden within Heaven itself?

This is where our story begins.

When the gates of Hell opened and the demons invaded Heaven, the once peaceful and harmonious realm was plunged into chaos. On the day God was killed, four demons were named the "Four Kings" and took control of the four regions of Heaven. Rumors spread that they possessed God's powers, as they seemed to be able to grant any wish.

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In the hidden corners of Heaven, however, there still existed a glimmer of hope: the Sapphire Order, a group of angels who continued to resist the demons. These brave angels fought against the invaders and protected the humans in their regions. Yet, the demons discovering this hidden sanctuary seemed imminent, and fear grew with each passing day.