In Dirac's Sea
In 2136, 16 years after the fourth apocalypse, and 58 years since the beginning of the first apocalypse, the world gained respite amid tragedy. The AX Empire, a Pacific island country established after the third apocalypse, has relied on elves and ancient technology to continue the world's people in the turmoil and war.
But when people gradually got used to the changes in the world, at the Shinkansen defense line in the eastern suburbs of Dirac City, the capital of the AX Empire, the siblings Ouyang Ling and Ouyang Xue, who were exiled during the "Fall of Shanghai" incident in 2133, witnessed new changes when their lives had just returned to normal, and the truth of history was slowly revealed.