In a hidden age of ancient Japan, spirits live beside humans. Among the most powerful are kitsune—fox spirits capable of taking human form. They walk the world disguised in silk robes and human skin, serving gods, guarding forests, or ruling hidden shrines. But kitsune are not just spirits. They are born the same way humans are born, raised in clans and families, and bound by a sacred rule: a kitsune chooses only one partner for life. When two souls are tied together by fate, the bond becomes