Synopsis: I'm the Villainess, So I'm Taming the Final Boss

As a result of her chronic illness, a young girl has been confined to a hospital room for most of her life, entertaining herself with otome games. One day, she suddenly finds herself trapped in the game as the antagonist, Aileen Lauren Dautriche. At the winter term's closing feast, Cedric Jeanne Elmir, the crown prince and Aileen's childhood friend, publicly breaks off their engagement to declare his love for the game's heroine, Lilia Rainworth. Determined to alter her predetermined destiny, the girl, who goes by Irene, vows to defeat Claude Jeanne Elmir, aka the "Demon King" and Cedric's half-brother, by making him fall in love with her instead. With time running out, will Irene accomplish her mission, or will she suffer the game's inescapable tragic end?