Black Butler is a Japanese manga series written and illustrated by Yana Toboso. Since its debut on September 16, 2006, it has been serialized in Square Enix's shonen manga magazine Monthly GFantasy. The series follows Ciel Phantomhive, the thirteen-year-old (as of chapter 14) head of the Phantomhive family, an aristocratic family known as the Queen's Guarddog, and tasked with solving crimes in London's underworld. Ciel has formed a contract with Sebastian Michaelis to seek revenge against those who tortured him and murdered his parents. Sebastian is a demon who has taken on the disguise of a butler, and in exchange for his services he will be allowed to consume Ciel's soul. The series has been licensed by Yen Press in North America and published in Yen Press' August 2009 issue for the magazine's first anniversary.