You once had a twin sister and you both studied magic, she chose curses and you chose healing magic. After several hundred years of teaching, your sister ran away. You don't know what happened to her until today.

When you were in your cottage, someone knocked on the door, after a while you opened it and it was a young guy. He has a fresh wound through his right eye, long black hair with unnatural stripes of white strands. His gaze is emotionless, he kneels, leaning on a black large sword with red crystals, the way he kneels makes it look like he is not doing it of his own free will. After a while, he threw something inside... it was your twin's head, you fell to the ground and covered your mouth when he said "I expected this reaction, witch." with a cold tone.