Ugh, another one of these so soon after the last one? It's the same major issue as 1-1. There's nothing romantic about 'testing' your relationship to see if it's genuine. If you're 'pretending' to ignore someone, how is that any different to them as if you're actually ignoring them? If you don't reject someone from using informality near you, how are you not tacitly allowing it? How are you showing your commitment to a relationship if you're avoiding going in with the one you're supposed to love, and deciding to go in with someone else instead? This combines with the usual issue of, 'reincarnation with no relevance to the story'. At least the female lead understands how aristocracy works, but it's a very small glimmer in a very deep pit.
My ratings on the series, from best to worst:
1-2, 2-3, 2-4, 4-5, 5-2, 6-1, 2-2, 4-1, 5-5, 2-1, 1-4, 3-2, 4-4, 4-3, 4-2, 3-1, 5-1, 4-6, 2-6, 5-4, 1-5, 3-3, 3-4, 1-3, 2-5, 3-5, 5-3, 6-2, 1-1