“Please leave quickly. I’ve always thought that someone as plain and dowdy as you is unsuited to this mansion.” A precious vase belonging to the master of the house was broken. The one wrongly accused and fired for the crime was Nina, a small, unassuming maid. Nina, though not well understood by those around her, handled all the mundane tasks of the mansion. Tidying up scattered tools, procuring seasonings and ingredients to suit the tastes of the master’s family and guests, cleaning up after careless maids, tutoring the unenthusiastic young masters and ladies, returning counterfeit art pieces, maintaining seasonal clothing, and so on and so forth… After Nina’s departure, the mansion appeared unchanged at first glance. However, it gradually began to crumble… but that was no longer Nina’s concern. Nina, for whom working as a maid was everything, suddenly decided to go on a sightseeing trip. And there, she encounters unfortunate girls. Emili, a sorceress with an abnormal amount of magical power but unable to use it well. Astrild, an inventor who is incredibly intelligent but somehow fails at her experiments. Tien, a moon wolf who is always hungry because of dietary restrictions and thus lacks strength. Thanks to Nina, the omnipotent maid, the girls are able to unleash their true potential. When they combine their powers, it easily rivals a small army… but Nina never learns this.