Izumi Sawatari and her younger sister Mitsuki have fled their home and are in desperate need of work. Their only available opportunity is to become maids in the mansion of 14‑year‑old millionaire Yoshitaka Nakabayashi. What seems like a simple job soon turns out to be far more demanding than the girls anticipated, as Yoshitaka proves to be a strict employer who insists they address him as “Master.”