Gu Hang personally ended the life of Li Mengqiao after she was infected, then followed her in death.
When he opened his eyes again, he discovered that he and Li Mengqiao had both been reborn on the day before the apocalypse.
He awakened the Armory System, while she awakened the Shelter System.
The two systems fused into the Real Estate Tycoon System.
While everyone else stockpiled food to survive, the two of them flipped houses and sold land.
With zombies surrounding the city, Gu Hang set up an artillery emplacement. "This school-district home takes just one case of canned food for a down payment."
In the middle of a zombie horde, Li Mengqiao handed out flyers. "A prime storefront in the apocalypse's CBD, and we'll throw in the antidote formula for free."
The world's survivors went completely crazy.