Synopsis: Hannin wa Anata Janakute?

"Yes, I'm a villainess... but I'm not the murderer!" I'm a mystery novel nerd who thought I had died covered by books, but I was reborn as Irina, the villainess of a romance novel. If the future awaits me as the story goes, then I, as Irina, will be decapitated. The very moment I thought of finding a way to avoid a bad ending, I was framed for the murder of a prince...?