The Precious Sister of The Villainous Grand Duke

Reborn as a sister of a villain with no blood or tears in a war-fiction novel.Anyway, that guy, who plays ‘my brother’ role, is a villain who will be sealed by the Main Lead after losing the war. So I just need to pretend to be his little sister until he disappears.No, at least that’s how I think …‘Something in your right hand, is that the main lead’s head?’My brother won the war.***“What’s with the suitcase?”“Yes?”At the tip of Dietrich’s long finger, there was a package that I had wrapped up as soon as he left for the battlefield.“I asked what it is.”“It’s, It’s a travel bag, brother.”“Travel? Alone?”Dietrich’s dark eyes glistened. The man who had just returned from victory had a strange smell of blood from mu*der.“Will you leave me?” Adapted to Manhwa Age Progression Aristocracy Beautiful Female Lead Child Protagonist Complex Family Relationships Cute Protagonist Demons European Ambience Family Conflict Female Protagonist Godly Powers Handsome Male Lead Hidden Abilities Love Interest Falls in Love First Male Yandere Mysterious Family Background Nobles Obsessive Love Older Love Interests Overpowered Protagonist Power Struggle Reincarnated in Another World Reincarnation Sealed Power Sibling's Care Siblings Not Related by Blood