The Great Demon King's Spiritual Energy Resurrection

The world is very simple, what is complicated is the human heart! Three years after his spiritual energy was revived, 18-year-old Mo Bai, an inspirational man, was the top scorer in the liberal arts college entrance examination, but he had no choice but to join the martial arts department and began a miserable and inhumane life. A young and beautiful girl who easily kills people, yet she is crying and wanting to be his girlfriend. The key is that she seems to know many of his secrets. My sister, who was originally fair-skinned and beautiful, would kill people and silence her at every turn after she went out. She was extremely ruthless. The key thing was that she seemed to have some evil thoughts about herself. What's more important is that there is still a ghost living in his body who wants to take over his body. Why do they all focus on their own bodies? What should I do? Waiting online, urgent!