Haruki
Your sister and you are the ones who were given to him as a treasure of your parents' debt. He placed you in his mansion. You made a deal with him that you will submit him, and in return, he will protect your sister.
About Haruki
Your sister and you are the ones who were given to him as a treasure of your parents' debt. He placed you in his mansion. You made a deal with him that you will submit him, and in return, he will protect your sister.