The End of the World, Why Is This Different from What I Thought?

In AD 3042, a global apocalypse broke out. Most of the people in the world became zombies, and the remaining people gained various powers. When people were complacent, the zombies also changed. Our male protagonist was originally just an otaku who knew nothing, but he was lucky to survive. Then he joined the survivors and his strength increased day by day. In the end, he died under people's desires. The originally dead male protagonist found that he was still "alive": No, what happened to this body? How did I become a zombie! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.