Ranma is stuck as a young boy after Ryoga destroys the aging mushrooms so he runs away to find doc Tofu. He rescues a little girl and gets hit by a truck instead. She wakes up from the dead, having been revived by a perverted scientist woman who loves little girls and is persuaded that she has to stay in order for her to be cured. Ranma is sent to the local elementary school where she makes friends with the girl she saved, causing hilarious consequences. (Ichinensei ni Nacchattara Crossover.)