In the twelfth year of the Taisho era, a young girl named Sakuya born into the Onmyoji clan carries the burden of exorcising demons and spirits. Yet her heart harbors a forbidden emotion. On a rainy night during a secret ritual, she encounters Aozuki, a demon in human form. Bound by a contract from a century past, Aozuki serves her family—but the glances exchanged between them transcend such bonds. Sakuya's father enforces strict laws forbidding contact with demons. Her brother shows no mercy t