Ranma ½: Nightmare! Incense of Spring Sleep

Original title: らんま½~悪夢! 春眠香

Happosai fed up with Ranma interfering with his hobby, decides to use a sleeping incense on him to make Ranma "sleep till spring". But Akane accidentally smells the incense and due to unforeseen side effects starts attacking everyone and everything in her sleep. Now the gang has to find a way to wake her up.