@liquidsword Sorry if it came out as being dramatic (and of course I know there are plenty of manga with fast romance) but a huge amount of shounen have MC who are denser than a black hole and take tons of chapters to realizes that they are in love with the Female lead
So much problems with this premise. Other than his age the idea that many others ran from her or when she searched their mind weren't at least somewhat attracted to her is hard to believe. Also who says that she shouldn't just return to the demon realm with her prize after marrying him?