Is Oomuro-ke: Dear Sisters hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

Movie · 2024 · 1 episodes · PG-13 - Teens 13 or older
CGDCT, Comedy, Girls Love, School
A spin-off of Yuru Yuri featuring Sakurako and her sisters.
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