暴君な姉に捨てられたら、公爵閣下に拾われました

In an age when it was said that a family born to a person with the ability to grant magic power would be safe and secure, the nobles would buy expensive jewelry and items with magic powers as jewelry and amulets. Sisters Jacqueline and Ellie were born with the precious ability to grant magical powers. The older sister, Jacqueline, who had bullied Ellie since she was a child and ruled over her as a tyrant, forced Ellie to use her magic excessively and amassed a fortune. Then one day, Ellie shows signs of depletion of her magic power, which will never return. Ellie is no longer of any use to her, and her sister abandons her in a state of tatters. Sinking into the depths of despair and losing all hope of living, Ellie is gently picked up by a duke named Irving.