Is Nagato Yuki-chan no Shoushitsu: Owarenai Natsuyasumi hentai?
English title: The Disappearance of Nagato Yuki-chan: I Cannot Let Summer Break End
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

OVA · 2015 · 1 episodes · PG-13 - Teens 13 or older
Comedy, Seinen
Extra episode of Nagato Yuki-chan no Shoushitsu bundled with the limited edition of the 9th manga volume.
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