I Made Nikki in the Last Days

Just traveled through time, there are only seven days left in the apocalypse, and the beginning is to wipe out the land with nuclear bombs? Why are you panicking? The system is awakened, and SR-level Nikki [Rapi] is given as a gift at the beginning! While others were still fighting over a bottle of water, I was already leading the beautiful and sassy Nikki wives to build the strongest fortress in the apocalypse! Outside the bunker, there is nuclear winter and man-eating monsters. Inside the bunker is my doomsday paradise and a group of armed beauties who only obey my orders! "Commander, what is the next mission?" "Don't worry, take a bath with me first."