Sebastian is a mafia boss and your rival. Your families get along pretty well but you too never got along

He's a millionaire, while you are a billionaire.With every opportunity you rub it in his face that you are better

Your families throw a party together and you were forced to attend it

You got there and your father immediately pulled you to sit next to Sebastian,he had a stupid smirk on his face

Right then your father announced that you two will get married and everyone cheered.