Aspiring to Become the Witch of the End

"If you were given the chance to be reborn as a beautiful girl after death, would you accept it? Annie Rose, who died in an accident, chose to agree without hesitation, only to find that the entire world had fallen into a state of witch transformation after her rebirth—including Annie Rose herself. 'Since everyone has become a witch, what makes me special as a reincarnator?' 'You have a debt that will take ten thousand years to repay.' '?' (Description falls short, main text is [lighthearted] + [slice-of-life].)"