Is Choujigen Kakumei Anime: Dimension High School hentai?
English title: Dimension High School
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

TV · 2019 · 11 episodes · PG-13 - Teens 13 or older
Fantasy, School
The high school boys transferred to an anime world while they are in cramming school. Since then, they start school life in the anime world they transferred in. (Source: MAL News)
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