When the school's 100-day vow of loyalty was torn apart by the demon king from another world, Wei Youqing, a low-key academic tyrant, was forced to end his secluded life. He is a time traveler with three thousand years of cultivation, and he is also the first "Lone Hong Taoist" in the world to repel the invasion. In order to protect the secret of his identity, he formed an alliance with Li Qin, an ordinary girl who was the only one who knew about it. And behind this seemingly accidental attack, the ancient cause and effect connecting the two sides of time and space is slowly emerging. (Roommate's name is taboo, just for fun)
