Kuroshitsuji - The Full Moon Slightly Chipped

Kuroshitsuji has some deep character development with interesting backgrounds and Alois Trancy might be the character whose story is even more tragic than Ciel Phantomhive. He is a little boy who seems to have everything despite having nothing at all.
This music is the character song of Alois Trancy, named "The Full Moon Slightly Chipped".