LetMeRegress - Don't read this LMR

What if one day our Mr. Regressor suddenly regressed like usual, only to find that his past was not how it had been in the countless times that he had regressed?!
What if someone, a person with not much role in his life and his future, suddenly turned into a whole different person?
Will our regressor who only seeks peace and food manage to find out exactly what is happening to his life?