Conquest in a world of primitive fantasy

It is one thing to be transported to a world of fantasy, with its monsters, races other than human, huge kingdoms and great heroes. But it is another thing to be transported to a world of fantasy in its primitive time, when the races begin to develop and the monsters are just becoming strong and where humans are the simplest of all. This is the story of a young otaku who is transported to this world with her modern knowledge, ready to break through adversity and create her own kingdom.