Is Long Zu hentai?
English title: Dragon Raja: The Blazing Dawn
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

ONA · 2022 · 16 episodes · PG-13 - Teens 13 or older
Adventure, Fantasy
Lu Mingfei is a typical high school kid getting ready to graduate. That is, until he receives an acceptance letter from Cassell College, a school he didn’t even apply to. Upon arrival, Lu learns that the school’s mission is simple: protect humanity from dragons. Caught in the midst of the age-old conflict, Lu soon uncovers the grim truth behind humanity’s war against the dragon race. (Source: Crunchyroll)
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