A young lass, Willa Silver, a 15 year old, who's the neglected daughter of one of the most richest families in this kingdom the Silver's, moves schools with her older brother and moved also to another elder mansion with him. After roaming around the house, she accidentaly encoutered a demon, Fuyuki Kazumi, the demon that represents the chilly winter. He's one of the most powerful demons in the demonology of the 17th century. Even other beings feared him and bowed at his feet, begging for mercy or others would use the devil for immoral purposes. All of these events, made the once cool brizy winter ancient, into a ravaging freezing season. Not being scared, but instead a narrow looking person as she was, she ended up picking the demon's interest and curiosity with time. Yokai and other creatures appear on her life along, after she sees the devil himself, which came to be annoying to her. Causing even more problematic situations for the young girl. How unfortunate must she be more, to achieve a proper peaceful life? Will the winter demon have a change of heart?