The Takashiro family has a history of suffering from an illness that creates an uncontrollable thirst for blood. Kazuna doesn't know about this and was sent to live with the Eda couple as a child. But the sickness starts to show its signs and Kazuna comes in contact wth his older sister Chizuna who has been suffering from the sickness ever since she was a child. Knowing that th sickness is a heavy weight to carry, Chizna tries to ease her younger brother's suffering...Sheep's Song (also known as Hitsuji no Uta in Japanese) is a dark four episode anime about vampirism, due to an illness. This naturally means both Kazuna and Chizuna are vampires, but their illness is a hindrance for them and it is told that people of the Takashiro family who suffers from the illness has committed suicide because of the mental pressure the illness put on a person.
The story is completely character driven and the characters are very well done. Even if it's a very short show, the lenght is good for it. Sadly this show was on a very low budget and as it always goes with shows with low budget - it suffers. The animation is made up by a lot of reused frames and the soundtrack isn't very good at all, but at least they coughed up enough money for a really good ending theme sung by Megumi Hayashibara (the voice of Chizuna) and Tomokazu Seki (the voice of Kazuna), which has an eerie and sad feel to it - perfect for this type of show.
I believe, if made right, this show could have been made slightly longer, but the length as it is was good too. So if you can get over the horrible budget the show without a doubt suffered from, this can be very enjoyable to watch. I myself had issues with the reused animation - especially for Kazuna's attacks due to the illness - but even so found it worth watching, because the story was good and the art was pretty.
By the end of the show I give it 4.5 stars, where the low budget is the only thing that lowers my rating from anything above.