Is Sorairo Utility hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

TV Special · 2021 · 1 episodes · PG-13 - Teens 13 or older
CGDCT, Sports
The special follows high school girl Minami, who is a beginner at golf, and her friends Haruka and Ayaka. (Source: ANN)
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