(Apologies if I don't make sense, but I have to say something)
I don't believe that ML would actually kidnap her father. Allowing monsters to invade, that I can see happening since it literally happened after ML told his subordinate (that ponytail kid with glasses) to come up with a plan, but kidnapping the father seems unlikely 'cause it doesn't really line up with what ML was aiming for. Plus, ML didn't know that her/"his" father was unwell and he would have assumed that her/"his" father was okay and doing well, so why would ML kidnap him, a former hero? AND let's not forget the fact of that he was genuine when he said that was indebted to her/"his" father for whatever happened back then, plus that kind of small blush expression on his face when he said that. Haaaa~
Plus, you'll find out right after this chapter anyways~