The Precious Sister of The Villainous Grand Duke

She was reborn in the war novel as the sister of the villain who had never shed blood nor tears. The person acting as my ‘brother’ was a villain who, after losing the war, would be sealed away by the male lead. So all I have to do now is pretend to be his sister until he later disappears. Or so I thought... [i]‘What’s that in your hand? Don’t tell me that’s the male lead’s head?’[/i] My brother won the war. *** "What's with that suitcase?" "Huh?" Dietrich's fingers tighten on the luggage that I had packed as soon as he left for war. "I asked you what this is." "It-It's a travel suitcase, brother." "You want to travel? Alone?" Dietrich's dark eyes sparked with violence. Having recently returned from war victorious, he sure smelled like a bloodthirsty killer. "And leave me behind?" [hr][i]Note: This is a oneshot promotional manhwa for the novel of the same name[/i] Villain Duke's Precious One / 악당 대공님의 귀하디귀한 여동생 / 悪党大公様の可愛い妹 / 恶棍的宝贝妹妹 / 反派大公的寶貝妹妹 / ฉันคือน้องสาวสุดที่รักของแกรนด์ดยุกตัวร้าย / Mon méchant frère et moi / Adik Kesayangan Grand Duke yang Jahat