Nepu Nepu Darake no Festival is a single-episode 2022 OVA and the middle chapter of a three-part series of Neptune OVAs. Its genres are action, comedy, sci-fi and supernatural. The episode came packaged with Good Smile Company's 1/7 scale figure of Dimension Traveler Neptune in her Generator Unit version. Before that release, it streamed early on several Japanese platforms in late December 2021.