Is One Room Special hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.
Special · 2017 · 1 episodes · PG-13 - Teens 13 or older
Slice of Life
Unaired episode included with the Blu-ray release. It uses clips of the initial introduction of all three girls respectively but has them in swimsuits instead of their normal attire.
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