Cabin Survival: I’m Unifying Another World

The apocalypse arrived, and everyone around the world was transported to a bizarre realm. Each person started with a small house, with terrifying monsters lurking outside. These monsters appeared every night. While you huddled in a corner, desperately waiting for daylight, danger would come before the dawn.

[Remember, we don't want to merely cling to life. We want a world united as one.] From this day on, those things will be the ones avoiding my edge.

(No System, and the protagonist isn't a saint. Everything he does is according to his own plans, and nothing can sway him.)