Hitsuji no Uta

Synopsis

A rare illness runs in Kazuna's bloodline, one that brings on an insatiable, vampire-like hunger for blood. Unaware of this family curse, Kazuna was placed under the care of the Eda couple during his childhood. When the first signs of the disease surface in his own body, he crosses paths with his elder sister, Chizuna, who has lived with the affliction since she was very young. Knowing how heavy a burden the sickness places on those who carry it, Chizuna reaches out to lighten her brother's struggle and guide him in managing his cravings, but...