The One to Carry On Part One

Michi o Tsugu Mono – Zenpen (道を継ぐ者・前編), also listed by Viz Media as Akane And Her Sisters, is the fifth Ranma ½ OVA.

Following a string of food thefts, Akane heads out to find the culprits when she runs into the sisters Natsume and Kurumi who soon follow her to the Tendo Dojo. Seeing how hungry the pair are, the Tendos decide to take them in. However, the sisters then reveal that they're searching for their father, Soun Tendo!

Trivia

 * This episode and its following part are the only OVAs not based on the Ranma ½ manga.
 * However Rumiko Takahashi did provide the character designs for Natsume and Kurumi.