I Will Personally Organize a Civilized Funeral

[Rigorous machine design + group portraits + fast-paced combat but slow-paced narrative] At the moment when the earth collapsed, human beings went to heaven and earth with grief and strength - colonial satellites and underground complexes allowed people to survive tenaciously for hundreds of years, and Noah's Ark gradually stabilized under the support of mechas. But one day, someone said this. "Isn't this too boring? Why not let humans do it again?" Thus, civilization once again went into throes due to someone's whim.