Is Ranma ½: Tendou-ke no Oyobidenai Yatsura! hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

Special · 1992 · 1 episodes · PG-13 - Teens 13 or older
Comedy, Shounen
This features a Nabiki narrated review of the series where she discusses various characters that the Tendo family has had to tolerate spliced with new animation of Nabiki hanging around the house, taking a bath, and wondering about the true identity of P-chan. It was available through the Kitty Animation Circle. (Source: furinkan.com/ranma/anime/specials.html)
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