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: Anime News Network)

Douglas, once known as a legendary enhancement spellcaster, is now little more than your average, weak old man. On top of that, he was kicked out of the hero party, and eventually had his adventurer’s license revoked… And that’s how he ended up a vagabond, wandering aimlessly. After an encounter with Rabi, a cursed little girl, a new adventure begins… *Source: Manga UP! Global*

Collection of short stories by various mangaka about the misadventures of Tomoko Kuroki.