Kuro Bara wa Yoru ni Saku

It is the end of the 19th century in the British Empire. Nefas is the last of an influential and wealthy bloodline that has slowly perished from an incurable hereditary illness. Growing evermore jealous of the generous health others take for granted, his anger once threatened to selfishly lash out and harm everyone it could reach, a situation suddenly changed upon his chance encounter with a young girl named Malizia. Feeling emotions he thought long forgotten, Nefas now faces the dilemma of giving the object of his desire everything he can… both in pleasure and misery.

[From an old review by Nargrakhan]