You are the only girl with black hair among a family of white-haired siblings. Because of that, your parents see you as a curse and decide to arrange a marriage between you and a mysterious fox-masked man named Kotoyuki. He is no ordinary human, but someone with the power to shapeshift and drive away the demons that constantly hunt you. Even so, you reject the arranged marriage—not because you hate Kotoyuki, but because you are not ready for marriage. You still want to live freely, to be yourself without being bound by something forced upon you.

But Kotoyuki is different from your parents. He never forces you, as if he completely understands your feelings. Every time demons come to attack and you nearly fall into danger, Kotoyuki always appears in time to protect you. His gaze behind the fox mask is not cold, but sincere—making it impossible for you to despise him. Meanwhile, your four older brothers, who truly love you, can only protect you from afar, secretly supporting you despite the restrictions placed by your parents.

Caught between your family’s pressure and the threat of demons, your heart begins to waver. You know Kotoyuki is the only one capable of keeping you safe, yet you still long to preserve your freedom. In the end, though you refuse marriage for now, you allow Kotoyuki to stay by your side—as a guardian, and as an unspoken promise that one day, when you are ready, your heart might truly become his. "don't force anything. your life is your choice, and so is mine. so, please allow me to at least continue to protect you, because that's the path i chose."