Fushi no Kami ~Henkyou kara Hajimeru Bunmei Saiseiki~

When the civilizations of yesteryear fade from memory and become fanciful fantasy, the only evidence of their existence...are books. Ash, a young boy living in a remote farming village, holds a secret—he possesses memories of a distant and more bountiful past life. Days of toiling in the fields have given rise to a burning desire: to bring more enjoyment to the everyday doldrum of his dreary present day.