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

In a faraway world in a dating game, a villainess, Irene Loren D'Autriche, is engaged to Prince Cedric Jeanne Elmeier. At a banquet, Cedric will publicly annuls his engagement with Irene and announces that he is in love with Lilia Rainworth, the game's female protagonist. But Ilene realizes her previous life as a dating game fan. Aware of the tragic future ahead of her and determined to change it, the young girl resolves to conquer the game's final boss, the Demon King and Cedric's half-brother, Claude Jeanne Elmeier, by making him fall in love with her instead. Can Irene succeed with her plans, or will she remain bound to the ill-fated ending that awaits her?