The Shelter’s Freaking Out! Why Is It Upgrading Itself Like Crazy?

[Endless firepower + multiple women + invincible steamrolling + unlimited leveling + the aloof campus beauty is my younger sister] Jiang Feng is reborn seven days before the apocalypse begins. In his previous life, he was reduced to someone else's plaything. This time, he plans to build a shelter of his own. So he returns to his village and joins forces with Zhao Meijing, the auntie who raised him from childhood, and her three daughters to build a shelter that can withstand the apocalyptic waves. When the first wave arrives, the trembling shelter actually upgrades itself! “Your shelter was so scared it wet itself, so it decided to upgrade on its own to face the danger ahead!” “Your shelter has successfully upgraded its firepower system! Red Alert Construction Vehicle unlocked! Full Red Alert system unlocked!” “Your shelter has successfully upgraded its weapons research lab, unlocking the AllSpark and nanotech armor!” “Your shelter has successfully upgraded its living area, unlocking a high-tech plantation spanning ten thousand mu!” “Your shelter has successfully upgraded its residential area, unlocking a mobile fortress!” “Your shelter has successfully upgraded its dimensional-strike weapons!” While everyone else is struggling to survive the apocalypse, Jiang Feng is drinking beer and eating barbecue with his family in the shelter.