7th Time Loop: The Villainess Enjoys a Carefree Life Married to Her Worst Enemy!

Rishe can't catch a break. After being spurned by her fiancé, she fled her home country to make a new life for herself - six times. In each case, she chose a different path to happiness, only to die at the age of twenty, five years after setting out – and each time she reawakened at the moment of being dumped. She's about to start her seventh loop, and this time she thinks she's got it figured out: each death was somehow related to a war started by Emperor Arnold. This time the plan is to stop the war before it starts, and when Arnold himself proposes to her the night of her escape, that seems like as good a way to do it as any. <em class=de-emphasized>(from manga)</em>

Synopsis from Anime News Network