7th Time Loop: The Villainess Enjoys a Carefree Life Married to Her Worst Enemy! Vol 2

From the Seven Seas Entertainment edition

KEEP YOUR HANDMAIDENS CLOSE, AND YOUR ENEMIES CLOSER Every time Rishe turns twenty, she dies and is reincarnated to the day her engagement is broken off. This time around, she winds up the fiancee of the man who killed her in her previous life: the crown prince of the Galkhein Empire, Arnold! Knowing from her past lives that Galkhein is on the path to war, Rishe is determined to prevent it. She starts by turning the royal villa into a training ground…for handmaidens! Will her unorthodox plans be enough to keep disaster at bay?

Source: Penguin Random House API