Saijaku Muhai no Bahamut

Five years after the Arcadia Empire was overthrown in a violent rebellion, former prince Lux finds himself entangled in a compromising incident when he accidentally trespasses into the bathing area of a female dormitory. There, he inadvertently witnesses the new kingdom’s princess, Lisesharte, in a state of undress, provoking her immediate fury and prompting her to challenge him to a Drag-Ride duel. These ancient mechanical armors, excavated from ruins across the globe, serve as the primary instruments of warfare in this era, yet Lux enters the confrontation with a peculiar reputation that belies his past glory. Once celebrated as the mightiest Drag-Knight, Lux is now paradoxically known as the "undefeated weakest" because he steadfastly refuses to launch offensive attacks during combat. Despite this self-imposed limitation, his exceptional defensive prowess has allowed him to survive countless engagements without suffering defeat. Following his fateful duel with Princess Lisesharte, circumstances compel Lux to enroll in an elite academy exclusively reserved for female royalty and nobility. Within these halls, he must navigate complex political tensions and personal challenges while training alongside the very individuals who now hold power over his fallen lineage.