Is Elsword: El-ui Yeoin hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

ONA · 2016 · 12 episodes · PG-13 - Teens 13 or older
Action, Fantasy
Nexon recently announced an anime called Elsword: El Lady and will be done by DR Movie and written by NZ. Nothing else has been announced.
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