Madoka worked as a maid for a wealthy family and had become engaged to the young master, Akihiko. However, due to the conspiracy of the butler, Nonaka, who secretly despised Akihiko, she was kidnapped by Makimura—a shadowy trainer—and forced into a brutal life as a slave. While pretending to worry alongside Akihiko about Madoka's disappearance, Nonaka harbored malicious intentions, his true motives deeply concealed.