Manga Living As The Tyrant's Older Sister

I woke up and realized that I was in a world that exactly repeats the plot of popular romance novels. But the saddest thing is that I woke up in the role of Alicia, who is the elder sister of the future tyrant. But it is sadly different, the fact is that this girl will die at the hands of her brother, she does not play any important role in this romantic plot.
Now all your life and energy will have to be used to change this plot and save your own life. To this end, the merchant had to be seduced, who, according to the main plot, would also have to die extremely quickly. I was going to leave the country with him, and after the first wedding night (which can really be called unforgettable), I had a strange suspicion - I saw his face! As it turned out, this is the Honorable Lancelot! What was he doing in my bed? How did he end up in it? And what will happen to me now?