The Precious Sister of the Villainous Grand Duke

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 successors... I've decided to stick to the villain in order to live! I need you to be my guardian until I run away from here. Raise me, villain!

Dietrich Lagrange is destined to become the story's most evil villain, in a family where everyone cruelly vies to claim their place as its head. But somehow, Anissa is worming her way into his cold, shut-off heart. Little does he know that she's actually a reader reborn as his baby sister. No matter what happens, she plans to survive the story rather than live out her character's original deadly fate! Can she remain by Dietrich's side as he rises in power within the dangerous Lagrange family? (Source: Tapas) *Note: Includes 10 extra chapters.*