Majo no Ie: Ellen no Nikki

A seven-year-old girl, unable to play outside due to a lifelong illness, is left alone after her parents leave her. She encounters a mysterious cat that offers her a new life as a witch in exchange for a home. In this new place, her illness is cured, but she cannot leave without becoming sick again. The cat agrees to teach her a healing spell in return for feeding him souls. Her desire for a healthy body leads to the deaths of many, taking more from them than just their lives.