Sheep's Song is a oVA anime that premiered in spring 2003, produced by MADHOUSE.

About the production: the story comes from a manga, there are 4 episodes of about 30 minutes and its current status is "finished".

Its main genres are drama and horror, with themes such as Vampire.

On AniList, Sheep's Song has an average score of 57%, an average score, and appears on 4,873 users' lists.

Kazuna's family has a history of suffering from a disease that creates an uncontrollable vampire-like thirst for blood. Knowing none of this, Kazuna was sent to live with the Eda couple as a child. As the sickness begins to show signs of being present within himself, he comes into contact with his older sister, Chizuna, who has been suffering from it since early childhood. Knowing that the sickness incurs a heavy weight upon those that suffer from it, Chizuna tries to ease her brother's burden, to help him learn to control his urges, but... (Source: Anime News Network)

Official synopsis from AniList.