The World's Richest Man and His Top Sister

On the way back from the hospital, Mu Guifan still couldn't figure out why Lin Qingzi hated him. Because I was too immersed in my thoughts, I didn't pay attention to the vehicles on the road, and I got into a car accident. Unexpectedly, because of this accident, he would go back to when he was in high school. What he didn't expect was that Lin Qingzi, who was more than ten years younger than him, was actually his fiancée. Mu Guifan, who knew that there is no unreasonable hatred in the world, raised the little girl as his biological sister, which could be regarded as making up for the unknown harm in his previous life. In addition, his unexpected rebirth also bound him to a system, but this system was a bit unfair. As a man, he knew that he had no use for it and transferred the system to the little guy. But why did the system change its name after changing its host? Why should her sister be involved in life and death? As time went by, he found that Xiaotuanzi was getting more and more powerful. He was afraid that he could not protect his sister, so he could only work hard secretly.