She's the Older Sister of the Obsessive Male Lead

After being reborn as a wealthy duchess's daughter, Yurenia Rohelio thought she’d live her days rolling in cash. Unfortunately, she’s also fated to die at the hands of her obsessive, villainous brother Lysandro! To secure a happy ending, Yurenia has little choice but to train her psychotic twin while he's still young so he doesn't become a villain! But just when she thinks her plan will bear fruit, she begins to realize that there is actually more to this dark story than meets the eye... (Source: Tapas)