Forty-five students became the doomed dynasty in the history books. They brought with them modern memories and a "script of national subjugation" written silently in advance. Prophets are not omnipotent - every time they correct one thing, history turns a page and the ink on the script becomes lighter. Severe drought, dyke bursting, civil unrest, border troubles, traitors, and the six surrounding countries... They had quarreled, were afraid, thought about running away, and finally decided to stay. Starting from an experimental field, a girls' school, and a local cannon, we turned the worst of times into the best, little by little. This is not a time travel for any one person. "I will protect my country by myself."