Is Mahou Sensei Negima!: Shiroki Tsubasa Ala Alba hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

OVA · 2008 · 3 episodes · PG-13 - Teens 13 or older
Adventure, Comedy, Ecchi, Harem, Romance, Shounen, Supernatural, Vampire
OVA episodes that are bundled with the limited edition of the manga volumes 23-25. First episode to cover chapters 176 and 177 of the manga. Second episode to cover chapters 178-180. And third episode to cover chapters 182 and 183.
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