Bai Yueguang's Bad Sister

I was born a bad boy and could kill someone by the age of six. My sister is the complete opposite to me. She is everyone's white moonlight, and she is also mine. I was locked in a secret room by my mother for ten years, and only she would come to see me. But ten years later, my sister was carried back covered in blood and disfigured. My mother opened my chains for the first time, and she said bitterly: "I want you... To kill everyone who bullies your sister!"