The Furious Princess Decided to Take Revenge. ~Devastating one's Homeland with the Power of Grimoire~

Story:

Elisabeth, offspring of a noble duke, was instructed to dissolve her betrothal during a social gathering by the heir to the throne, who had shifted his affections to another maiden. She discovered she had been wrongfully detained in her own fortress and had been deceived by her very own nation, to which she had devoted everything. Having reached the end of her tether, Elisabeth made the decision to defect, armed with her potent spell book. She set out to commence a fresh existence and establish a new enterprise in a foreign country. All the while, underneath her calm exterior, she harbored a burning desire for retribution against her homeland. The stunning duke's daughter, who has been "discarded" and "incarcerated", wields her most potent spell book. She employs her "networks, economic power, and military might" to vanquish the traitor.