Yue Ayase gets separated from the rest of Ala Alba during the chaos in Mundus Magicus and wakes up with no memory of who she is, knocked out by a stray broom and rescued by a student named Collet Farandole at the Ariadne magic academy. Taken in by Collet, Yue enrolls to train as a magic knight, and during one class a name catches her attention: Nagi Springfield, a young gladiator making waves in the world's biggest fighting tournament, whose final bout is set to take place in Ostia. This spinoff OVA gives Yue her own self-contained story away from the rest of the Negima cast.