Akuyaku Reijou wa Seijo Route wo Nozomanai: Watashi, Ikemen Kouryaku Nante Shitakunain desu

I was a plain, unfeminine woman, but before I knew it, I woke up in the world of the game I was playing! And to think that I'd become the villainous young lady Alyssa, a character I hate the most... On top of that, Alyssa is on the verge of being sent to a dirty old man as a prostitute by her evil sister, the queen, under the guise of being a saintess! As Alissa tries to escape from the royal palace, a wild and mysterious handsome man assists her rescue. But the forceful man orders her to perform serve him in exchange for his help!

(Source: Harper Collins Japan)