With all the Ranma characters showing up, I won't be surprised if Jusenkyo
turned out to be a cover up that fooled even the Knight Sabers
And 2 other things:
I see you forgot to change Megumi's age. Take care for it.

	Only Kami-sama knew how it was tearing up Keiichi form the inside.

I do believe "... how it had been tearing up..." would be better.