i know it's fiction but come on like, i don't care how japanese he is there is no way he would not have said;i didn't mean it instantly especially after finding out her age
You should cook that boar liver before eating it. You don't want to die because of food poisoning, then reincarnated in another isekai... as a boar. This is just in case.
Jokes aside i guess that marriage proposal is so sacred even father was about to give in multiple times. Well at least its accurate about how a father can change his mind after seeing his daughter's smile.