The manga, with its intricate plot and well-developed characters, has attracted a large and dedicated fan base worldwide. The Sebastian x Ciel pairing is particularly popular, inspiring a vast array of fan art, fan fiction, and cosplay. Fans appreciate the complexity of their relationship, which evolves significantly over the course of the series.

Sebastian kneels, one knee to the floor. He takes Ciel’s bare hand and presses his lips to the contract seal—not a kiss of a servant, but a predator tasting its future feast.

"Then devour me. But until that day... you are mine."