Mangachan's Manga

I just stayed for the art which is amazing after a couple of chapters. However, the premise of the story where the MC has to choose a family to marry in order to find out if they are the devil does not make sense at all and is ridiculous. So what if the first family she picked was not the devil and nothing bad happened then who will inspect the other two family? Why does she has to marry to verify it unless the whole purpose was to marry her off? Why did the temple sacrificed her on second life and not before? The beginning section was rushed and seemed to be written to just give an excuse for mc to marry the ml. Not very well thought out.