Polar Night Sequence

In the tenth year after the arrival of the red moon, the real world overlaps with the "abyss dimension". Space cracks called "rifts" appear all over the world, and alien beasts are rampant. Human beings gain superpowers by awakening "gene locks" and build high-walled cities. The sequence levels range from F level (mundane) to S level (natural disaster), and above that there is the legendary "divine sequence".