Swords and Rain Amidst the Chaos

There are no "what ifs" between us, because I took the wrong path from the very beginning. Perhaps you could say that my very birth into this world was a mistake. I have killed many people, those who deserved it and those who didn't. I made them all die beneath my blade. But do you know? No matter what, I would never hurt you. You are my only light. For someone like me, who can survive only on blood, you are my salvation. I want to protect you. All I want is for you to live happily in this world. It doesn't matter what happens to me, as long as you're happy, that's enough. I heard him say that you're having a child. I really want to see the child grow up. If it's a boy, he must take after him. If it's a girl, she must take after you. They'd be wonderful children, wouldn't they? Because they're yours. I miss you so much. I want to see you one last time, and then I'll kill myself. Because even if you forgive me, I can't forgive myself. I don't want to keep killing. I wish you happiness. You are my sister, my only sister. I will never let you suffer. I promise. Yu Luo. Theme: