Survive as the Adopted Daughter of a Genius Duke

In her previous life, Reina was a graduate student who survived academia by mastering the art of flattering her professor. Now reincarnated as the adopted daughter of a powerful duke, she must rely on those very same skills to stay alive. Knowing that she exists within the world of a novel, Reina understands that her adoptive younger brother, Kilian, is the male lead destined to eventually eliminate her. With the original story's tragic events still far in the future, she devises a desperate survival strategy: diligently showering the young Kilian with affection, running his errands, and constantly offering him snacks to secure his favor. Her efforts prove overwhelmingly successful—perhaps too successful. The once-chubby child begins making innocent declarations that he intends to marry her, which Reina quickly dismisses as childish nonsense. However, as time slips away unnoticed, Kilian grows into a man with a deep voice and an intense gaze, bluntly telling her that he has never viewed her as a sister, but as a woman. Now trapped in a tense game of cat and mouse, Reina remains singularly focused on escaping her fate, while the obsessive male lead cares for nothing except keeping her by his side.