OVERLORD Creator(overlord harem xopreader)

You will expect some errors in my first fanfiction.

In a world where population is so bad that you can't see the sky and have to wear special masks.

An adult about 18 yo that seems to be playing a game called Yggrasil in fact he was one of the creators that made it he was with his friend Momonga they talked and he left. He tought 'i created this game so I'll stay here'.

I do not own the cover or overlord also I don't think I will continue this or not.