A Little Beggar Stole My Identity as the Legitimate Daughter, So I Went on a Killing Spree

I am the Duke of Ying's legitimate daughter. When my grandmother fell gravely ill, I volunteered to spend three years praying for her at a temple.

When I returned to the Duke of Ying's residence, I discovered that my brother, who had always doted on me, was now showering affection on Lin Wan, the adopted daughter my mother had taken in. He personally arranged a grand coming-of-age ceremony for her and announced to everyone that she was the duke's legitimate daughter, while I was the adopted one.