Demon Heart Ten Crossings

Two hundred years ago, the little fox gave his heart to the girl who saved him, then turned around and forgot about it. Two hundred years later, in her tenth life, she fell into the arms of a demon who was missing a heart. He smiled so warmly in the spring breeze that his knife was sharpened silently. He didn't know that the heart he had been looking for for two hundred years was put into her chest by his own hands.