After the fall of the Kingdom of Hard, all members of the royal family were executed. The only survivor, the last princess Rizerote, sought asylum with the Grand Duchy of Larus, bound to them by a marriage alliance. The only maid serving the princess—now suffering from severe depression—is Hannah, a girl who lost all her memories after nearly drowning. Tossed around by Charlotte who schemes to become the next Grand Duchess, and her cruel maids, Hannah struggles to endure each passing day. Then, the long-awaited young duke, Vincent, finally returns. “You need to become the princess.” “…Me?” He declares that Hannah will attend the upcoming diplomatic event between Hard and the Republic in disguise as the real Princess Rizerote. And so, Hannah— “If you’re the type who guards your virtue before marriage, I suppose that’s unfortunate.” —sets off on a dangerous journey with the cold-hearted young duke who treats her life like it’s worth nothing. And Diego, the shameless scoundrel who never misses a chance for physical affection, saying, “I’m fine with three milk brothers sharing a fiancée.” Together, they embark on a deadly voyage with Hannah as a fake princess… Forgotten memories. Lost truths. From a lowly maid to a doomed princess— After that day, everything changed.