The Billion-Dollar Son-in-Law

After being humiliated by his girlfriend and a rich heir, delivery boy Leo Clark activates the Super Rate of Return System. He unexpectedly marries Claire Sterling, the 300-jin comatose heiress of Riverton's wealthiest family. Relying on the System, he awakens his wife, appraises treasures, plays the stock market, and thwarts villains' plots, rising from the bottom to become a top global tycoon and reaping true love and wealth.