The Zashiki Warashi of Intellectual Village - Volume 5, Longing

Emperor Zi Yu used 5 strikes of his axe to split mountains and unify everyone underneath the heavens. He partitioned the land into 9 areas, thus establishing the Nine Cauldrons which eventually became known as the 9 prefectures.

She was the Spirit Master of the Tea Hill. He was the Head of the Kunlun. They met each other by chance in Jiangnan. With many twists and turns, they got married. Unexpectedly, there were plots in store for them. After the resurrection, he forgot her… But she had his child… To meet him again, she endured the torture of the naga poison; for the people of the Tea Hill, she chose to be a devil… But fate still pushed her to a path without a turning back… She killed demons and devils but was used by others… Finally, she had to stand opposite to him… For the happiness and benefits of the three realms, she was incarnated as the Creation Goddess… She was the Spirit Master of the Tea Hill, Jiang Wuyou…

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.

On that fateful day, a voice in the sky told everyone on Earth that the world they called home has just been part of some sort of simulation.