Why am I helping the villain duke?

Bellona Rosentine is sick of returning again and again after dying, no matter what choice she makes. To break free from a cycle of regressions that has repeated more than twenty times, she decides to make a choice she has never made in any of her previous lives: To help redeem Deminic, the dark sorcerer who is the “villain” in the original story. Hoping that if she prevents the future where he loses control as a black mage, something will finally change… Bellona sets out on that path. But contrary to what she expected, several men—including Deminic—begin to take interest in her, and for the first time in this life, Bellona ends up falling in love with Deminic. Even though she finally finds the “hourglass” that could break the cycle of regressions, her life only becomes more tangled than ever.