Aileen doesn't spiral into panic or self-doubt the moment she remembers she's the doomed villainess, she decides to seduce the Demon King instead, and commits to it with zero hesitation. The show moves at its own unhurried pace, letting you actually breathe between moments instead of cutting to the next plot beat. What makes it work is that Aileen stays fundamentally herself throughout: confident, direct, genuinely funny without trying too hard, and the Demon King's slow realization that he's being seduced by someone who is completely, unapologetically serious about it becomes the entire romantic engine.

Aileen Lauren d'Autriche's engagement to crown prince Cedric ends when he breaks it off in front of the whole student body so he can be with Lilia Rainworth. The shock brings back memories of a past life: she has been reborn as the villainess of an otome game, fated to die within three months. Rather than accept that ending, Aileen makes a plan to win over Claude, the Demon King, final boss of the game and Cedric's half-brother, and marry him. Claude doubts her motives, so she sets out to earn his trust by helping with his wish for peace between humans and demonic beasts. The result is a comedic fantasy romance with supernatural touches.