Lucifer: The uncrowned monarch who is mature and stable but extremely protective of his adopted son, the feathered serpent that symbolizes "death"
Gabriel: a cold and lonely little monarch with low self-esteem and longing for warmth, a gray phoenix that symbolizes "despair"
Lucifer is Gabriel's adoptive father, teacher, and assistant. He puts down his crown, guides Gabriel's growth, and fulfills all his wishes, except that he cannot give Gabriel the death he desires most.
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There will be love, family, and friendship, as well as various settings and backgrounds, and the content of the side plot may be more than the main plot ()
Intention: To love each other as a family is to be true in an ordinary way