From the Start, I Had a Trillion Yuan, and My Ex-Girlfriend Regretted It

[Don't read this one! It's bad! The author dropped it! My other books are good, though!]

Su Yi is the grandson of a top tycoon. To keep him safe, his grandfather lets him grow up away from the family until he turns eighteen. When Su Yi comes of age, his grandfather brings him home and hands over the entire fortune. But the grandson is too kind, and the wolves in the family ruin his reputation. In the end, a car accident takes his life.

Reborn, Su Yi returns to his days as a poor student, just after his girlfriend has dumped him. He suddenly gains the Tycoon System, which gives him three years to spend a hundred billion yuan.

Then he makes his ex-girlfriend regret leaving him and everyone who bullied him regret picking on him. He builds an empire of his own and goes to stand before his grandfather, ready to protect him himself.