Monica is still in shock from the events of the school festival, but her next trial won't wait. She has been chosen to participate in a chess tournament held between Ridill's three most prestigious schools—and that includes her alma mater, Minerva's! Monica dons an elaborate disguise to keep from being recognized, but not everything goes to plan... What's more, there may be an even greater danger lurking at the competition. Has Monica's undercover school life finally reached its end?