Humanoid Court Count

She must rely on a clockwork to move around on the seventh day of every month. She was originally the daughter of an earl, but she had to pretend to be a boy in the outside world. When she was ten years old, a fire caused her to lose everything in an instant. In order to find the murderer, she made a contract with the devil. As a price, she lost the qualification to love and be loved. Later, in order to save her dying relatives, she made a deal with the God of Death and sacrificed her walking ability. Devastated, she came to China and met her sister, whom she thought was dead when she was eight years old, and the boy she saved... When she thought she no longer needed the devil's company, what would be her fate? Will he sleep forever as a doll, or...