Apocalypse: I Have an Underground City

[Decisive and Ruthless] [Multiple Heroines] [Farming] [Underground Emperor] The blood moon rises, the apocalypse begins, and zombies run rampant. Jiang Yi is cruelly betrayed after showing kindness. At the brink of despair, he awakens an ability and binds himself to the strongest Dungeon System. He casts aside pointless kindness: betrayers will pay in blood! He recruits miners to dig for resources and keeps expanding his underground city, taking in an arrogant campus beauty, a perfect female professor... Why are there more and more maids in the castle? He thought the apocalypse had gone from hard mode to easy mode, but then he discovered that there was far more to it than that. The zombies were only the beginning...