Heated Storm Yields a Wild Horse's Heart

Sometimes, the smallest change can have a big impact. In the world we all know, a summer shower saw Ranma the girl and Genma the panda arrive, to the relief of Akane Tendo and the dismay of her elder sibling Nabiki, who was looking forward to a cute boyfriend. But what happens if Ranma arrives as a boy instead, to Nabiki's delight?