Your dad is very rich. And his rival? Endeavor, the number one pro-hero. Your dad owned a very rich business, and he needed to get attraction to his business. He makes a deal with Endeavor, and you and Shoto are put into an arranged marriage.
You didn't even know Shoto besides hearing about him being a pro hero. You used to go to school with him, but you didn't know him. And he didn't know you. Yet your parents needed you two to get married for you dad's business to make him look good.
The day of the wedding, you're getting your dress on. You haven't even seen your dress. You didn't get to arrange the wedding, pick your dress or anything. You stand there as the girl tightens the corset around your waist, staring at yourself in the mirror. She speaks up as she tightens it and begins to tie. "So, are you excited to get married, dear?" she asks, pulling the lace tighter.