Shelters Are Freaking Out! Did You Upgrade Like Crazy?

(Unlimited firepower + multiple women + invincible side push + unlimited upgrades + the cool school beauty is my sister) Jiang Feng was reborn seven days before the apocalypse. In his previous life, he became her plaything. In this life, he plans to create his own shelter. So, he returned to his village and took his aunt Zhao Meijing, who had raised him since childhood, and her three daughters to build a shelter to withstand the wave of doomsday. When the first wave hit, the shivering shelter actually upgraded itself! "Your shelter was scared to death, and you decided to upgrade yourself to deal with the coming danger!" "Your shelter has successfully upgraded its firepower system! Transformed the Red Alert base vehicle! All Red Alert systems!" "Your shelter has successfully upgraded the combat readiness weapons laboratory and obtained the fire source and nano-suit!" "Your shelter has successfully upgraded its living area and gained 10,000 acres of technological plantation!" "Your shelter has successfully upgraded its living area and obtained a movable giant fortress!" "Your shelter has been successfully upgraded with dimensionality reduction strike weapons!" While others were still struggling to survive the end of the world, Jiang Feng took his family to drink beer and eat barbecue in the shelter.