Is Muv-Luv Alternative: Total Eclipse Recap - Climax Chokuzen Special hentai?
No
Rated R+ (Mild Nudity) on MyAnimeList and not tagged as Hentai.

TV Special · 2012 · 1 episodes · R+ - Mild Nudity
Drama, Gore, Mecha, Military, Sci-Fi
A recap primarily of episodes 3-19, this special aired prior to episode 20. It also included the new OP/ED of the series and a preview of what's to come in future episodes.
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