Is Saijaku Muhai no Bahamut hentai?
English title: Undefeated Bahamut Chronicle
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.
TV · 2016 · 12 episodes · PG-13 - Teens 13 or older
Action, Ecchi, Fantasy, Harem, Romance, School
Lux, a former prince of an empire named Arcadia that was overthrown via a rebellion five years earlier, accidentally trespasses in a female dormitory's bathing area, sees the kingdom's new princess Lisesharte naked, incurring her wrath. Lisesharte then challenges Lux to a Drag-Ride duel. Drag-Rides are ancient armored mechanical weapons that have been excavated from ruins all around the world. Lux used to be called the strongest Drag-Knight, but now he's known as the "undefeated weakest" Drag-Knight because he will absolutely not attack in battle. After his duel with Lisesharte, Lux ends up attending the female-only academy that trains royals to be Drag-Knights. (Source: ANN)
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