This book is also known as a heavily altered version of Date A Live. The characters are the same, but the story unfolds very differently.
Thirty years ago, Nidhogg, a disaster dragon who coveted the power of the World Tree, led the Dragon Calamity Cult in an invasion of Earth.
The Seven Elemental Sacred Beasts, who should have protected Earth, were corrupted into Demon King Beasts through the cult's schemes.
In the end, Nidhogg and the Seven Demon King Beasts were sealed away by a Giant of Light, the incarnation of Earth's will, who sacrificed himself to do so.
Thirty years later, the remnants of the Dragon Calamity Cult regroup and launch another attack on Earth, while humanity rallies its forces to fight back.
At the same time, what entanglements will arise between humanity and the guilt-ridden bearer of calamity from outer space, and the one who inherited a planet's will and bears its mission?
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