After Dressing up as a Brothel Girl, I Turned Black

The day I traveled through time and became a brothel heroine, I told myself that I had to step on all the good people and climb up in order to survive. I personally poisoned the knight who saved me, and defrauded the infatuated scholar of his ransom money. Until the original heroine asked me with a sword: "Why are you like this?" I smiled and stabbed her in the chest: "Because in your stories, the vicious female protagonist never deserves a good death."