It is a manga and Japanese anime series combining science fiction, romance and comedy. The story is about a former female android soldier, Mahoro. Guilt about her actions during her days as a warrior, she decides to spend the rest of her time to spend as the housekeeper of the son of her deceased commander.
Mahoro, gynoid fighting a secret organization called Vesper, decide to spend the days that separate it from its operative term as a waitress serving Suguru Misato, a student of higher living alone in the family home.
