Why Would You Want Me? ( Killua x O.C)

" Here is my middle child, I taught her everything I know, and I hope she will please you and your family Master Zoldyck," said a man who seemed to but 30 of age. The girl who is standing beside the man was the age of 13, and she knew what was going on, and if she doesn't do this, her family will die. The head of the...