Shampoo and Ukyo Kuonji plan a trip to a cave with a reputation for splitting couples up, the idea being that Ranma Saotome and Akane Tendo come back apart and Mousse gets left behind. That is the first of three OVA episodes here; the second lets an oni out of a sealed box to start hopping between people in Nerima, and the third has a slighted doll take possession of Akane to teach Ranma a lesson. Each one is adapted from a separate manga chapter.