Doomsday: My Awakening Shelter Upgrade System

[Shelter Construction + Unlimited Upgrades + Multiple Girls + Castle in the Sky] In 2035 AD, space cracks tore apart the world, monsters from other worlds poured in like a tide, and human civilization collapsed overnight. Chen Mingyu, an office worker, was bound to the [Ultimate Shelter] system at the moment of doomsday - his initial shelter was actually just a public toilet. While others were still fighting zombies for a mouthful of moldy bread, Chen Mingyu relied on killing monsters to upgrade the shelter from a "temporary stronghold" to a "sky fortress": electricity, purified water, weapons factories, planting bases, everything. The scarcest resource in the apocalypse is not materials, but safety. The goddesses who used to be admired by the stars could only put down all their pride and crowded in front of his fortress, just for a place to survive. The thick alloy gate opened with a bang, and the cold metal light spread across the earth. Chen Mingyu stood on the top of the high wall with his hands on his hands, overlooking the trembling survivors outside the door. His tone was domineering and unquestionable: "If you want to enter my shelter, you don't need any background or connections. Be obedient, work hard, and obey the rules. I will ensure that you have no worries in troubled times and have enough food and clothing." Su Jianwei, the former school belle, was the first to bow her head, losing all her past arrogance and sincerely surrendering: "I would like to follow in the footsteps of my master." From then on, the strong returned to their hearts, and the beautiful followed them. Chen Mingyu holds the invincible system, kills strange beasts and builds a city in the sky. In troubled times, all living beings are suffering, but he is the only one who controls life and death, sits in a prosperous paradise, and lives a unique hegemony in a collapsing world.