My Enchanted Wife of Fortune

Bobby Green sees Helen Gray again on a dating show and hurries her off to register their marriage. Five years before, Irene Gray, the Gray family's adopted daughter, had drugged him as part of a scheme to harm Helen, the heir to the Gray Group. The scheme went wrong and Bobby and Helen ended up spending the night together. He did not forget her. Since then Irene has taken control of the Gray Group. Passing herself off as Helen, she got close to Bobby, pulled confidential material out of the Green Group, and quietly attacked its investment projects one after another. The Green Group is now close to bankruptcy, and Bobby does not want to lose Helen a second time. After the wedding he gives Helen her first sum of money. This sets off a cashback system: every amount spent on her comes back a hundred times over. Bobby and his sister do not believe it at first. They keep spending on Helen to test it, and each time the hundredfold return arrives. Irene turns up more than once to make trouble, and each time the siblings put the returns in front of her. After enough rounds they accept that the system is real, and the rest of the Green family starts spending on Helen as well.