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

OVA · 2017 · 2 episodes · PG-13 - Teens 13 or older
School, Shounen, Sports, Team Sports
Bundled with limited editions of the 21st and 22nd volumes of the manga.
View on MyAnimeListShare
Check another title