More please

Okay, a couple of other quick points.

First, you give evidence that Nabiki and Kasumi know that Akane was setup relatively early in the chapter, and by inference when they bring Ukyo up to speed on what's happened. Yet Nabiki doesn't mention tell Akane that she and Ranma were setup until three quarters of the way through-why not? You've not told us why Nabiki would withhold such information from Akane.

Second, there's the fact that you keep teasing the reader with whatever "horrible" thing Akane told Ranma to break him. The first couple of times you used this literary trick, I expected you to then divulge what exactly was said. Instead, you've kept it going into chapter two, way beyond the merits of the device. There's nothing Akane could have said, by now, that would make holding back on the info worth it, and when you do state the remark, it will come as an anti-climax. Just my POV.

While normally too much fanfiction relies on dialog (and nothing but, since the authors seem to have spent their lives doing nothing but reading and watching manga and anime), I would suggest your interesting work concentrates too much on narration. Now, I like narration a lot, but take this example:

"Shampoo just stood terrified, knowing that her two rivals had caught on to what she had done. Ordinarily, she would have risen to the challenge, but her guilty conscience, still fueled by the potion she had accidentally inhaled when she had overdosed Ranma, drained her will to fight. Shampoo, strongest warrior of the Joketsuzoku in her generation, began to cry in fear and shame, like a small child caught doing something horrible. This was going to hurt!"

We're entering what should be an action/emotion high point in chapter one. Yet by using brief narration, here, you distance the content of what you write emotionally from the reader, at the point (presumably) when you want them most engaged.

That aside, please don't stop work, and I look forward to future installments. :)