Kuroshitsuji

Kuroshitsuji (Black Butler) is a dark fantasy manga that follows the adventures of Ciel Phantomhive, a young English aristocrat in the 19th century. After losing his parents in a mysterious fire, Ciel makes a pact with a demon named Sebastian Michaelis to seek revenge while preserving his social standing. Together, they solve supernatural and political mysteries while unraveling the dark secrets of the Phantomhive family.