Lament of the LambLament of the Lamb.

Lament of the Lamb (Japanese: 羊のうた, Hepburn: Hitsuji no Uta; lit. "Song of the Sheep"), alternatively titled The Lament of a Lamb or Sheep's Song, is a Japanese horror manga series written and illustrated by Kei Toume. It follows Kazuna, a boy with a mysterious illness which turns out to be vampirism.