I've enjoyed this fic so far, but...I'm not sure if this flashback
helps the storyline along. The execution just didn't do much for me
and to tell the truth I was more satisfied with Akane and Ranma's
breakup before it was explained thoroughly.
One of other major problems with this is feasibility. To tell the
truth I don't think that Kuno would react like that (or even get it
with an explicit explanation, which a drugged Nabiki might not be able
to give in the first place). And even if Akane failed to beat Kuno,
which I can see with some of the training he's gotten over time and
his initial advantage, there is still Ranma. If Ranma can't beat Kuno,
this makes no sense because Kuno would just attack him...if he can, it
still makes no sense, because Nabiki and Akane just need to delay until
he gets there--and then _he_ beats the photo's out of Kuno.
Anyway, though I've liked the story to this point, I think you would
be better off either leaving the breakup unexplained or at the least
altering it to eliminate some of the weaknesses. This felt a lot like
a plot device, and while most points in a story are...they shouldn't
seem like it ;)
Hope this helps, even if it did come off a bit negative. I'm looking
forward to more chapters of the story in general.