The "alchemist of the highest peak in the world" who thought he was a "half-person alchemist" drank a rejuvenating medicine.
The next time the alchemist waked up was the world 500 years later.
Alchemy has already declined and alchemists have been despised.
There is nothing you can't do in advanced alchemy.
This is the story of the world's best alchemist destroying common sense in the world.