For unknown reasons, Dieanira Achlys Manson, the Duchess of Manson, was helped by a demon to restart her life after she died at the hands of her husband... with one problem... She's a One-spell user. One-spell user is labeled as the lowest and weakest mage in the ranking system due to the inability to acquire another spell, resulting in ranking up unsuccessfully. Unwilling to accept her destiny, she has no choice but to strive to become something that nobody has ever seen. But how she'll make it