Tsumiko and the Enslaved Fox

Tsumiko is named heiress to an ancestral estate and its accompanying fortune. Only the legacy comes with an aloof heirloom: an inhuman butler. Argent has served the family for centuries, and she must renew a generational bond or he'll die. He hates her for the hold she has over him, but he craves her soul almost as much as he craves his freedom.