Reforming the Obsessive Male Lead

Once, I was reborn in an unknown novel. But as soon as my parents from the new world died and I was adopted into the duchy, I realized what kind of work I got into... It was a BL-webtoon with a tragic ending, where all the characters die, and I am a minor character who, in the course of the story, will have to die the very first! Moreover, I am destined to die at the hands of my beloved Lucian?! Fortunately or unfortunately, there is still plenty of time before the tragedy begins. Now I am the daughter of the duchy in which my pet lives, so I can have time to change the sad ending! However... I was just trying to make Lucian an affectionate ML and achieve a happy ending, but his obsession suddenly turned out to be directed at me?! (Source: Kakao Entertainment Corp., translated)