The Lonely Swordsman

A lonely swordsman was walking in a ruined city. Countless buildings were in ruins while zombies flooded and destroyed everything in its path.

An A-rank zombie led those zombies to destroy everything in its path. After successfully evolving, the A-rank zombie whose sentience was comparable to that of a human had developed greed for power.

Destroying every building in its path was to destroy the hiding locations of humans. The A-rank zombie who identified himself as "Jonathan" had planned to slaughter and devour any humans in its path.

Jonathan wanted to evolve to S-rank and his plan was to devour every living being in this world. After devouring all humans, he planned to devour those plants and animals that had evolved into zombies. If that wasn't enough, he would also cannibalize those zombies.