A duke's daughter whose engagement was broken off by a womanizing prince completes her revenge by seducing all of his mistresses.

A maid, a young lady, and ultimately even a princess from another country. The lowest of men, reaching out to every woman he laid eyes on. That was my fiancé, Prince Alyugel. Every time his infidelity was exposed, I was forced to endure it—for the sake of the royal family, for my own family's sake. The engagement couldn't be dissolved because of the country and the house, they said. As his fiancée, there were certain obligations I had to bear... Those were days of humiliation. However, this time, he apparently got the imperial princess pregnant. Considering the relations between nations, I finally thought the engagement would be dissolved... but instead. For some reason, I was the one whose engagement was broken off, and I was even cast out by my own family. That's right. I don't have to endure anymore—is that what this means? Then. I shall do the very same thing to him. This is the story that came some time after Miss Colette, having resolved herself and become absolutely furious, caused complete havoc.