I Lived an Honest Life Only to Have My Fiancé Betray Me, So in My New Life I'll Live as the Villainess

Raised strictly as a light mage from a young age, Mianna Caroline was shaped by the belief that living an honest life would always be rewarded. However, after her mother’s passing, her home life deteriorated when her father remarried and showered affection solely on her stepsister while neglecting Mianna entirely. To compound her heartbreak, her fiancé abruptly ended their engagement, declaring his intention to marry her stepsister instead. Crushed by this ultimate betrayal and disillusioned by a lifetime of unrequited sincerity, Mianna’s despair drives her to access forbidden dark magic, a power strictly barred from humanity. Yet, in that very moment of transformation, time reverses, and she awakens on the exact day of her birth. Met by God, who grants her a second chance at life, Mianna receives a fresh start. Armed with the memories of her past and a drastically changed perspective, her journey to heal her wounded heart and forge a new path begins once more.