I've Become A True Villainess

After dying as an overworked graduate student, she wakes up as Seria Stern, the destined-to-die villainess of a romance novel. Determined to rewrite her tragic ending, Seria cleans up her reputation and avoids the original plot's pitfalls, only to find the story twisting in unexpected ways. When the supposed 'innocent' Saintess returns and her own fiancé wavers, Seria realizes that surviving might require more than just being nice. Can she forge a new path with the help of the mysterious Grand Duke Rouche?