Online novel experts, come in and take a look at my background structure!

I want to write a novel, the background is the continuation of Investiture of the Gods, but because it is only a campus novel, the world is much smaller. I have been thinking about it for some time, but now I can't think of it. Please give me some advice. The background: 3000 years ago, Su Daji, the leader of the Demon World, bewitched King Zhou, demonized the entire Shang Dynasty, and attempted to conquer the entire human world. Seeing that King Zhou was deeply poisoned, Nvywa joined forces with Marquis of the West Ji Fa to attack King Zhou to stop the ambition of the expansion of the Demon World. After a bloody battle, the alliance army of humans and gods finally defeated the demon army, destroyed the Shang Dynasty, killed the Demon Empress Daji, and sealed the entrance to the Demon World... 3000 years later, in the south of China, the male protagonist who wanted to commit suicide jumped into a deep pool and accidentally swallowed a bead and broke a mysterious jar. Inside the jar was sealed Yan Yuqing, the female protagonist, who was Daji's subordinate. The bead was Yan Yuqing's inner core. Because the male protagonist's special physique resonated with the inner core, Yan Yuqing lost most of her magic power and couldn't retrieve it because the protagonist was protected by the inner core. The protagonist wanted to die, but he couldn't, so the two could only live together. Later, Yan Yuqing entered the school where the male protagonist was studying... I'll continue to improve later. Let's comment on the beginning first! I focused on the plot, not love. Although Yan Yuqing was the female lead, she was only the female lead in the plot. The male lead and another human girl had a love scene. She and the male lead were just fighting partners. Of course, if you think that the male and female protagonists must love each other to the death, then you can only say that your definition of male and female protagonists is too narrow. Later, with the help of Yan Yuqing, the male protagonist slowly learned how to use the inner core to implement the black magic and made a breakthrough. He grew up in the school and fought with the demons he met, and met all kinds of partners. The male protagonist began to pursue the girl he secretly liked, and the girl came from an exorcist family. There was a mysterious handsome man who dated Yan Yuqing. Later, Yan Yuqing was used to open the door of the demon world. Yan Yuqing was killed. The male protagonist broke into the demon world to take revenge and failed. The demon world began to demonize the human world, and everyone began to save the world... That was about it.