Vampire Princess - Dark

At the coming-of-age ceremony, at the alternation of night and dawn at the age of 18, my father fell back into sleep, and I stepped on the door to the human world. An immortal body requires blood to maintain, but how can I bear to hurt people who have done nothing wrong. The crimes they committed were nothing more than a torment in just a few decades of life, but as far as my immortal beauty is concerned, what else is unforgivable?