The Heroine Had an Affair with My Fiance

To avoid her predetermined death by guillotine, Siella Labyrinth befriended Tirielle, the female lead. But their friendship only lasts until Siella discovers that Tirielle is in an affair with her fiancé! Reeling from the shock and betrayal of this plot twist, Siella decides to get back at the adulterous pair by proposing a revenge affair to the male lead, Crown Prince Raynous, who accepts her offer. Will this new affair help ensure Siella's survival or bring her an ending she never expected?