"I just wanted to be a normal person!"

One fine day when our hero happens upon a lucky chance and was granted overwhelming power which gave him the ability to go against even the mightiest of beings.

But because he was too strong, he was isolated from the world he used to belong to.

Now, with the powers he has on hand, our protagonist will train to lose his powers instead of gaining them.

How would his journey to become the most normal and mundane person in the world work out?