Cheng Yan travels through time, only to end up becoming an honorable prince in the Middle Ages of Europe. Yet this world was not quite as simple as he thought. Witches with magical powers abound, and fearsome wars between churches and kingdoms rage throughout the land. Roland, a prince regarded as hopeless by his own father and assigned to the worst fief, spends his time developing a poor and backward town into a strong and modern city, while fighting against his siblings for the throne and absolute control over the kingdom. Join Roland as he befriends and allies with witches and, through fighting and even farming, pushes back invaders from the realm of evil.
The Mathematical Olympiad textbook itself did not bear much significance, but the premonition attaching to it did. During the initial exploration of the Dreamland, Roland had discovered that the books that he had never read were all blank, and this theory applied to both the books on bookstands and those in the library. Most books were nothing but blank sheets topped with a cover. He even speculated that those book covers were productions of some thin threads of his memories fading into oblivion. If he had never seen a book, it would never exist in the dream world.
But the Mathematical Olympiad textbook on Zero's desk debunked his theory.
He wondered why he had not noticed the peculiarity at the beginning. Had he overlooked it during the exploration in the first two or three months, or it was actually a change that occurred later?
If it was the latter, he had to probe into it.