Ruria, reborn as the second daughter of a ducal house, retains memories of her past life. In her previous existence, she was a princess, a saint loved by spirits, but she was murdered by her uncle who usurped the throne. To make matters worse, she's apparently feared as the villainous woman who almost destroyed humanity. Determined to hide her past, Ruria aims for an inconspicuous life. However, spirits and their fluffy guardian beasts gather around her. This is the story of a half-spirit, half-human, truly perfect saintly young girl aiming to live inconspicuously with her fluffy companions.