The World's Richest Man and His Top-Tier Star Sister

On the way home from the hospital, Mu Guifan couldn't understand why Lin Qingzi hated him.

So lost in thought that he failed to watch for traffic, he got into a car accident.

Unexpectedly, the accident sent him back to the start of high school. Even more surprising, Lin Qingzi, who was more than ten years younger than him, was now his fiancee.

Knowing that no one hates without a reason, Mu Guifan treated the little girl like his own younger sister and doted on her, hoping to make up for the unknown harm she'd suffered in his previous life.

The unexpected rebirth also bound him to a System. But the System was more than a little dubious, and since he knew he had no use for it as a man, he transferred it to the little girl.

But why did the System change its name after switching Hosts? And why was it making his little sister work herself to the bone?

As time went by, he realized that the little girl was becoming more and more capable. Afraid he wouldn't be able to protect her, he could only work harder in secret.