Sharing a System with an Old Enemy

[The leader of the righteous path has max combat power but is a love-struck little white flower vs. The arrogant and vicious black-hearted lotus who lacks love but is really sweet and controlled by his wife in the later stage] Ten years ago, in the Battle of Mu Tomb, two well-known bosses emerged. One was the brilliant and talented swordsman Bai Jin, and the other was the infamous and despised demon king Yan Shize. Rumor has it that the two of them couldn't deal with each other when they were in the Xuanjian Sect. They would often fight over trivial matters, and sometimes they would even fight to the point of life and death. Even the day before Bai Jin stood out from all the candidates and ascended to the position of Sword Master, Yan Shize, who was already a demon king, did not hesitate to go to the Immortal Spirit Stage alone on a full moon night when his body was at his weakest, and fought Bai Jin to the death of both sides. But after all, he was the leader of swordsmanship who only met once in ten thousand years in the world of cultivation. On the second day, Bai Jin ascended the spiritual platform, carrying a sword at his waist, with a heroic appearance. He didn't look like he was physically injured at all, but the relationship between the two was completely forged. Years later, Bai Jin died in the Heavenly Tribulation, and people in the cultivation world were panicked, fearing that the demon Lord Yan Shize would attack Lingshan and cause death to all living beings. As expected, the tall and cheerful figure came back with a chilling air, threatening to kill all the so-called righteous monks. But as soon as Yan Shize said something, he was stopped in time by the handsome woman in a light-colored gown next to him. Yan Shize seemed to listen to the woman's words, and nodded with a gloomy face. Everyone is a novelty: "Could it be that the demon king also loves beauties to bring disaster?" "Who is that woman?" "Who can make a majestic demon king fall under her pomegranate skirt?" For a time, there were divergent opinions in the cultivation world, and everyone began to speculate on the identity of the woman next to Yan Shize. A few days later, the sword master Bai Jin suddenly returned, and everyone was overjoyed. It turns out that she has withstood three heavenly tribulations one by one. She has been practicing swordsmanship in seclusion in the world for these years, and has successfully broken through to the eighteenth level of Wuxin Swordsmanship. In addition, Bai Jin also brought back a white fox. She looked calm and said to everyone calmly, "This is my spiritual pet." The white fox looks very well-behaved, with a pure white body and shiny fur. It slowly transforms into a human appearance, but it is shocking: "Why is it him?" "How could the Sword Master allow this devil to run rampant in the world?" "How could the spiritual pet that the Sword Master conquered be Yan Shize?!" With a straight nose and thin lips, Yan Yan smiled, Yan Shize took in everyone's reactions, raised his eyebrows, leaned into Bai Jin's ear, and whispered in a voice that only she could hear, as if to confuse people: "They don't believe in the relationship between us, what do you think we should do?" Reading guide: 1. Double c, 1v1, he 2. The female protagonist's combat power is explosive throughout the whole process. The male protagonist needs the female protagonist's protection in the early stage, and her combat power will be improved in the later stage. Mission: Work hard to create miracles