The Heroine's Forge: High-Tech in Ancient Times

She accidentally traveled through time and space to become a princess, and was framed by others for having an affair. As the future crown princess, the crown prince did not believe her and insisted on breaking off the engagement with her. She traveled back and forth between the two time and space at will, selling ancient artifacts to make a lot of money, and using modern weapons to make foreigners surrender. In the end, the crown prince refused to break off the engagement with her!