Anime: I Want Harem - Chapter 13

A mysterious natural phenomenon caused the Earth to be plunged into darkness. The world turned into an endless bloody chaos and mankind is on the brink of extinction…

Luo Yi had secretly loved Chu Chen for quite a while and discovered that Chu Chen seemed to really like. . .

Um. . . really like certain 18+ things. . .

So Luo Yi decided to follow Chu Chen’s lead and walked onto a path of being f*cked. . .

- Description from Novelupdates

A modern-day antihero, who was infamous for his devious acts, dies in an explosion meant to take down a powerful criminal syndicate. Waking up in a world of sword and sorcery, he finds himself possessing a fragile, powerless body with a strange “System” that seems broken. Initially thinking he's doomed, he learns that by pretending to be weak, he can manipulate others into revealing their secrets, granting him abilities they possess. As he rises in power, he discovers that the System was intentionally sabotaged—by none other than his own future self.

In the steampunk world, races are mixed, and all spirits coexist. This is a different world that worships Iron Armored City!

The smelting furnace provides kinetic energy, heavy weapons protect dignity, and armor is the strongest protection. Every mobile ‘Iron Armored City’ is an independent force.

Every ‘Iron Armored City’ is a hunter driving in the wasteland, and likewise, all Iron Armored Cities are prey in the eyes of the stronger!

- Description from novelbuddy