Reborn as the Villainess, I Might as Well Go All In

I was originally just a civil servant in the Underworld. After encountering so many wronged souls and vengeful ghosts, I became an old bookworm. Before long, the entire Underworld had fallen in love with reading under my influence, and the King of the Underworld was the most enthusiastic reader of all. As the bookworms’ tastes grew ever more discerning, the King of the Underworld commissioned me to become a book spirit and enter various books to improve their plots and quality. But why am I always cast as the villainess? And one who never gets a happy ending, at that! Your Majesty, what kind of twisted hobby is this? I decided to throw caution to the wind, and unexpectedly, the results were better than anyone could have imagined…