Akdang Daegongnimui Gwihadigwihan Yeodongsaeng

I became the sister of the villain, who shed no blood or tears in a war-ridden novel! I thought I was born again as the youngest daughter of a noble family, but I'm the little sister of a villain who's only being used!

A baby's body too fragile to survive in the Lagrange household, a brutal family that makes children fight for successor...