The Dark Crow Smiles is a song used in the Kuroshitsuji anime which can be heard on Kuroshitsuji Sound Complete Black Box disc 1, track number 10. It is also available on disc 2 (track number 14) as a remix. The song describes Sebastian Michaelis in his job to protect his master, Ciel Phantomhive. This song is sung by LotusJuice in English while the chorus is sung in Latin. The chorus is the Catholic song "Agnus Dei", which means Lamb of God.