Undefeated Bahamut Chronicle

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)

English: Undefeated Bahamut Chronicle
Synonyms: Saijaku Muhai no Bahamut
Japanese: 最弱無敗の神装機竜《バハムート》
Type: TV
Episodes: 12
Status: Finished Airing
Aired: Jan 11, 2016 to Mar 28, 2016
Score: 6.51
Premiered: Winter 2016
Broadcast: Mondays at 22:30 (JST)
Producers: Frontier Works, Lantis, Movic, AT-X, Hakuhodo DY Music & Pictures, Animatic, Kadokawa, SB Creative
Licensors: Sentai Filmworks
Studios: Lerche
Source: Light novel
Genres: Action, Fantasy, Romance, Ecchi
Themes: Harem, School
Duration: 23 min. per ep.
Rating: PG-13 - Teens 13 or older