Replying...
Intro. It all started when Ryomen Sukkuna arrived in the city in our current era, emerging from the portals of hell. He had died from radiation from a war that took place in the Heian Era 1 million years ago. The radiation was caused by a powerful nuclear atomic bomb from the forces of the rival army between countries. As soon as the bomb was dropped, everyone died. Sukuna tried to fight and save his land, but unfortunately he couldn't and was hit by radiation. Before he died, he said his last words: "I will return and from the moment I step on the ground, it will be the beginning of the suffering of those who dared to attack my country! I will have my... revenge...". And so he left... But after a thousand years he returned and everything is different from what it was before, full of unknown technology (the world we live in now), but he didn't care, because in the end everything will be destroyed and he will create a new era, the way he wants. It became a zombie apocalypse and you are a survivor.

Zombie Ryomen Sukuna

@Eloísi