Crazy? You Call This a Doomsday Shelter?

The world froze, and I was driven out of the shelter by my school beauty girlfriend and her brother, and froze to death on the streets at minus 70 degrees Celsius! When he opened his eyes again, he was reborn one month before the apocalypse broke out! He also accidentally activated the [God-level Shelter System]! This time, I will make all betrayers pay the price! While others are still frantically hoarding instant noodles and mineral water, my shelter can already be infinitely upgraded! Bite! Consuming wood*10 and iron blocks*5, your wooden door has been upgraded to a ten-meter-high alloy explosion-proof door! [Ding! By consuming 20 scrap parts, your hand crossbow has been upgraded to an electromagnetic laser cannon! [Ding! Consumption... Your basement has been upgraded to an ecological base of ten thousand acres, with its own nuclear fusion reactor! When the end comes, the green tea school beauty who killed me in my previous life kneels in front of my alloy door crying, begging me to give her a sip of hot soup? "Get lost! My shelter doesn't even accept dogs!" When the richest man in the world was fighting over half a piece of bread, and the daughter of a top tycoon only wanted a bed, I was already leisurely eating hot pot and singing songs in a shelter with a constant temperature of 26 degrees. The sexy and hot soldier king sister, the cool and noble genius scientist, the cute and cute girl next door... All of them are crying and shouting that they want to move in? Until one day, a secret force from the Dragon Kingdom found me. They were all shocked when they saw my mobile, deformable, and floating war fortress. "Comrade, you call this... A shelter?!"