Madoka was working as a maid in a wealthy man's house, but she was noticed by the young master of the house, Akihiko, and they decided to get engaged. However, due to a scheme by the butler, Nonaka, who was not happy about this, she was taken away by the dark trainer Makimura and trained as a slave. Nonaka pretended to be a good person and worried about Madoka, who had gone missing with Akihiko...