Fushi no Kami ~Henkyou kara Hajimeru Bunmei Saiseiki~

In a remote, forgotten village untouched by progress, a young boy named Ash carries memories that do not belong to this life. Reborn with vivid recollections of a past existence filled with comfort and abundance, he struggles to accept the world around him—a land mired in medieval gloom where even the simplest engine has yet to be conceived, and everyday survival is a battle against hardship. Refusing to resign himself to such a backward age, Ash dreams of reigniting civilization itself: a future where homes feature proper sanitation and where the world is bound together by travel swifter than any horse. His hope lies in rumors of a highly advanced ancient culture said to have flourished in the distant past, its wisdom preserved within books that still survive. Drawing on the resources of the local church, he teaches himself to read and patiently gathers the knowledge he seeks. Yet reviving a civilization is not a task for one boy alone. Rallying the people around him—including Maika, the village chief's daughter—Ash sets out to breathe new life into his humble home, determined to raise his small village into the seedbed of a renewed and flourishing world.