Maid nara Touzen desu. Bannou Meid, Nureginu Kabutte Tabi ni Deru.

Plain little Nina loves her job as a maid in the house of Count Mirkwood. But her life is turned upside down when she suddenly gets dismissed for a crime she didn't commit. Cast out with nowhere to go, Nina sets off on a journey to see the world, determined to make the best of her newfound independence. Yet despite her unassuming appearance, Nina is no ordinary maid. She has superhuman talents, and it isn't long before she finds new friends in need of her help. From a rookie mage who can't channel her true magical powers to a brilliant inventor struggling to get her experiments off the ground, Nina makes quick work of lending a helping hand. All the while, back at House Mirkwood, things are quickly getting messy in Nina's absence… This supermaid is on a mission—and she's sweeping everyone off their feet! (Source: J-Novel Club)