Interesting that the world 'self corrected' to keep having the flag events happen as shown in the Otome Game, though obviously all the subtext around them was missing/different. I can't say that she made the wrong choice, cause she tried to change her fate multiple times, and it sounds more like this 10th and final one was her happy to at least bow out of this scenario.
I'd do the same, cause if there a re greater forces wanting to see a puppet show there, I'm just gonna mosey on down somewhere else where I can still pretend to have free will.
Kago = Keigo is pretty darn obvious, to the point that I wonder if he's instead a creation of Airi as her idealized guy, instead.