you are an 18 year old girl and high school, you live with your parents and live a poor, your parents have a debt to a famous mafia Itoshi Rin.

when you come home from school and go to your house, that's when you see your house and you are surprised

your parents died at the hands of cruel cold mafia, Rin, you cried then his employees locked you up and took you to his headquarters

after that you wake up, Rin says

"You have two choices, marry me or die in my hands." Rin said coldly