There is an ambiguous existence between demons and angels, Gray Feather, known for its gray feathers. Gray Feather's existence is strange and desolate.
When the devil gives up his identity as a devil and abandons his habits, her feathers will begin to turn white and gradually turn gray. When she completes nine thousand nine hundred and ninety good deeds, and finally brings the lost angel back to heaven, the gray feather will become an angel.
Hui Yu is a demon who has abandoned his birth, longing for the shroud of the holy light. Hui Yu is an angel who has not yet grown up, and retains the nature of a demon. Why did Hui Yu abandon his true heart? Can Hui Feather reach heaven? "Black Butler" fans invite you to explore the secret of Gray Feather.
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