Rebirth at the End of the World: Me and My Kingdom

A team of top killers in modern society, after being wiped out by the zombie wave at the end of the world, collectively traveled back to three months before the end of the world. This time, they no longer sacrifice their lives for anyone, but only fight for themselves. They use the lessons of blood and tears in their previous lives and the huge sums of money in this life to jointly build an apocalyptic fortress that cannot be destroyed and protect each other's only "family."