Apocalypse: Starting in the Campus Belle's Dorm, I Guzzle Toilet Water

【Apocalypse】+【Reborn】+【Stockpiling Supplies】+【Exploring All Kinds of Houses】+【Farming and Building in the Later Stages】 The apocalypse arrives, and every house in the world stacks up endlessly, forming a skyscraper with no end in sight! Humanity must never leave the building! Anyone who does will die! Resources inside the building are limited. If you want to survive, you have to plunder! Plunder! But be careful! When you enter a house, what awaits you might not be the pool of clear fresh water in the toilet, but a terrifying ambush! Jiang Chen is reborn. In his previous life, he woke up in the campus belle's dorm room. Foolishly, he struggled to survive with her and protected her every step of the way, only to be betrayed and killed by her and their classmates, who took all his supplies! This time, he's going to survive, and he won't spare a single one of the people who betrayed him! (P.S. Finding a cat might be a good thing. It can ease the loneliness of your journey, and when you're hungry, it can become emergency food... perhaps... people are no different?) (This isn't an apocalypse novel about frantically hoarding supplies. In the middle and later stages, the focus is more on exploration and gathering, making your base safer and more prosperous. So I guess it's an apocalypse farming novel? Please go easy on me if that's not your thing~)