Fierce Devil Husband

She did not believe in love, because she had seen too many profit deals and had long gotten used to using her hurtful identity to shape the side of being cold and ungrateful. 
A perfect strong woman was the one who lacked emotions, so even if it was a marriage, it was merely a meticulously calculated relationship of benefits for her, because compared to love, she believed more in the partner under benefits.
Until one day, when their partnership was broken and she was heavily in debt, the man said he wanted her love to be repaid.