Ah, nice to have something good after the awkwardness of 3-5. I quite enjoy this one, both focused on showing the earlier parts of an arranged relationship and how it develops, and also giving the female lead some genuine agency. It also does a good job of teasing the other relationships through the viewpoint of someone who's young and innocent, which lets both the initial misunderstanding and the conclusion feel right. It also doesn't 'force' any of the relationships - everything occurs through appropriate discussion of, "This is what I think. Does that sound right?", and allowing everyone involved to come to their own conclusions. I'd say the most notable downside is that this really isn't a 'villainess' story - it's adjacent, but not quite there. It still does a good enough job to be high in my ratings.
My ratings on the series, from best to worst:
1-2, 2-3, 2-4, 2-2, 4-1, 2-1, 1-4, 3-2, 3-1, 2-6, 1-5, 3-3, 3-4, 1-3, 2-5, 3-5, 1-1