She Professed Herself Pupil of the Wise Man (Light Novel) Vol. 12

In her quest to find Wise Man Artesia, Mira pursues the phantom thief Fuzzy Dice, who may know the whereabouts of Mira's missing companion. But her mission is derailed when she runs into Kagura in a city along the way and learns of an outbreak of child kidnappings. There's no way Mira can ignore such atrocities--her only choice is to go undercover in a maid outfit to catch the dastardly criminals!