Doomsday: My Fortress Can Be Upgraded

In the tenth year of the end of the world, I died due to the betrayal of my brothers and enemies. When I opened my eyes again, I went back to three hours before the disaster broke out! In this life, I carry ten years of memories with me and vow to make up for all my regrets. The cute little girl who was rescued turned out to be a little lucky star who could bring about miracles; the team they formed will become the iron wall of the apocalypse. Enemies must be paid with blood! And my first step is to build a steel fortress that will never fall! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.