Akuyaku Reijou tte Nani wo Sureba Iin dakke?

A woman named Cardinell regains her memories and discovers she has been reborn from a middle-aged romance novel enthusiast and lab researcher into a character within a romance game, cast as the villainess. She lacks firsthand knowledge of these games and has only vague expectations of what is to come. Accepting her situation, she resolves to embrace her role and be exiled. In preparation for life after exile, she focuses on studying medicine, her former profession, and strengthening her family relationships. However, the prince, whom she expects to end their engagement, appears to genuinely care for her, as do the other members of the royal family.