Ah, another "Reality Ensures" one. This one's very close to the top for me - it goes through both the process of getting there, and the actual steps and consequences of what might happen with that level of broken engagement, combined with competence on both the villainess and the new romance. It doesn't have the same 'happily ever after' tone that some do, but I find it's a more clean resolution than the fuzziness of some. I'm very fond of this one.
For my reference, the best to worst so far:
1-2, 2-3, 2-2, 2-1, 1-4, 1-5, 1-3, 1-1