In the thirteenth year of Chenghua in the Ming Dynasty, Fang Yingwu, a graduate student in the Department of History, traveled through time and became a scholar. This was the era when an otaku casually became the emperor. This was an era without authority. This was also an era of loyalty, evil, and black and white. This is the era when the country has no major troubles, and it is governed by the arch. This is also the era when the laws and regulations are lax and the official style is lazy. Five hundred years in a dream, the legend of the magical time traveler begins.