Exploring the past, a half-demon boy, a proud girl with a blood feud, and a son of a boss who hates monsters with hatred. In the treacherous conspiracy, the three of them work together to solve the case and search for five ancient tokens. In the process, they meet new partners, unravel the layers of fog together, and gain a new understanding of "humans" and "demon". In the end, they use "understanding" and "empathy" to eliminate the thousand-year gap.
She vowed to "only save monsters, not humans", but he wanted to save every life in front of him. When the war between humans and demons resumed, she stood before the demons as a human, and he stood at the top of the human race as a demon.
With a bodhicitta, he listens to the joys and sorrows of the world; as a mortal, she bears the grievances and hatreds of the two worlds.
Purpose: The novel explores how to break the cycle of hatred with "empathy" through a series of emotional entanglements between humans and monsters. It is an elegy to narrow-minded hatred and a hymn to universal love and understanding across races.