Rurikawa Tsubaki, a former noble whose clan was destroyed by the influential nobleman Poorman, is forced into servitude as his personal maid. Through a series of degrading "training" exercises and sexual humiliations, Poorman seeks to break Tsubaki's spirit and strip away her noble dignity. Despite her intense disgust and hatred, Tsubaki is subjected to his whims, marking the start of her grueling transformation into a submissive servant.