Is Fate/Grand Carnival hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

OVA · 2020 · 4 episodes · PG-13 - Teens 13 or older
Comedy, Fantasy, Parody
The first episode of "season" one was pre-aired on the Fate Project New Year's Eve TV Special 2020 program.
View on MyAnimeListShare
Check another title