Lament of the Lamb

Lament of the Lamb (羊の歌、ひつじのうた, Hitsuji no Uta, lit. "Song of the Sheep"), alternatively titled The Lament of a Lamb or Sheep's Song, is a manga series written and illustrated by Kei Toume. It was adapted into a live action film in 2002 directed by Junji Hanado, and an anime OVA series in 2003–04. There was also a six-part live TV miniseries and a radio drama.

Plot
The story centers on Kazuna, an "average high school student" who starts to lose control at the sight of blood, or even just a blood red colour (as seen in volume one when Yaegashi shows him a bottle of red paint). This problem is traced down to him being a vampire, like his lost sister, Chizuna, who he now turns to for help.

Kazuna lives with his "aunt" and "uncle" (both of whom are actually old friends of his father), after his mother died, and his father took Chizuna and left. Kazuna is friends with an aspiring artist named Yaegashi, who later learns about his condition. They both have feelings for each other at the beginning of the story.

Kazuna and Chizuna's father had committed suicide six months before the start of the (manga) story and trying to understand his suicide is one of the central plot points of the story.