In 2236, a cataclysmic mutation descended upon the world. Countless savage demons poured in, slaughtering and devouring everything. A miracle from the heavens brought the power to fight back, becoming humanity's only hope...
As despair and hope overlapped in the apocalypse, the fates of a boy and a girl intertwined like threads, forming a golden key buried in a vine-covered copper lock. It turned gently, and the gears of the world began to turn once more...
[Fantasy! Sci-fi! Mecha! Harem! Love triangle drama! The lazy Qiye is storming into the world of SF with his left-hand girl and right-hand girl! The stars and the sea are our destination! (Not really)]
