Or how about one where Kei and Yuri turns out to be
Onna Ranma and Akane(with long hair)?
Not only do they look alike, but both also creates a lot
of property damage. It's a perfect match ^_^

Heh... well, as it happens, look for Dirty Pair Splash, sometime in late July.

Zen is writing this very story. ^_^

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Zen no Itan-sha
Apprentice to the Angels of the Apocalypse