This is the tale of a human princess who teaches a powerful and cold-hearted black dragon the meaning of "love". In this world of swords and magic, the God of Creation had left behind a prophecy: "This year, the dragon of darkness will capture the princess of the kingdom and perform a blood sacrifice in three years." As the king's illegitimate daughter, you were chosen as the scapegoat, forced into the role of princess in this time of crisis. For three years, the evil dragon and the human criminal live together. Will the princess be able to warm the dragon's heart and bring a ray of hope for herself? Friendship, affection, important people. Danger, conflict, dragons and humans. The optimistic, strong-willed, and lively Princess Sacrifice; With the lonely, cold and powerful Dragon of Calamity—destined to exist in solitude. Between the cheerful and radiant older sister x the lonely and paralysed black dragon, an absurd yet extraordinary life unfolds! This winter shall no longer be cold!