The Villainess’s Daughter is the Guardian of Ruined Love

After the death of her beloved mother, Erkina—once scorned as the ‘daughter of a wicked woman’—was adopted by the lord of the northern magic tower. Though awkward and gruff, her adoptive father cared for her sincerely, and following his example, Erkina too became an exceptional mage.
But her world was shattered once again. Her father lost control of his magic, and together, they brought ruin to the continent.
Having lost two people she loved, Erkina chose to save others, just as her adoptive father had asked in his final words.
In exchange, she chose to perish along with the collapsing land.
And only later did she learn the truth of her father’s feelings toward her mother.
“Without you—my antidote—I unleashed my magic time and again, trying to destroy this world along with myself. I thought that was my atonement… and proof of my heart.”
“Atonement? Don’t tell me… the reason Father lived alone his whole life was—?”
Now, Erkina is granted another chance. She returns to the day of her eighth birthday. She cannot waste this opportunity—she must find a way to save everyone.
“Magic! I want to learn magic! From the greatest mage, the Tower Lord Zertemion!”
Her mother’s face twisted strangely. No matter how she looked at it, there was only one emotion written there.
“There’s nothing to learn from that fool.”
Contempt and disgust. This has to be a failed romance… Is this really okay?
“I’ll protect you, Mommy! Waaahh!”
She’ll fight the villains, so her mother isn’t branded a witch and killed.
“Teacher, please become Erkina’s father!”
While keeping her father’s rival in check, she’s already busy enough trying to bring the two together.
“I—I really like that, my lady!”
“You’re the only one I can rely on now, Erkina. So… don’t abandon me.”
Why are these two boys so annoyingly fixated on Erkina?!