Is Military!: Tamatama Shoumetsu Suru Shiroki Hikari! hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

Special · 2015 · 1 episodes · PG-13 - Teens 13 or older
Comedy, Ecchi, Military
Episode 13 included with the Blu-ray/DVD release.
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