Crown Prince Cecil of the Alphasta Kingdom has married Bertia, a woman who insists she is a villainess from an otome game from her past life. Despite her best efforts to act the part, her genuine kindness and earnest nature have only endeared her to everyone around her, and the couple now enjoys a peaceful and loving married life. Their tranquility is interrupted when Bertia receives a request from her friend, Princess Risona of the Umyuve Kingdom, asking her to help plan and produce her wedding ceremony. Eager to assist, Bertia and Cecil travel to Umyuve, where Bertia soon realizes that Risona’s situation mirrors a story she read in her past life. In that story, Risona is a villainess who abuses her younger stepbrother and his fiancée out of jealousy, leading to a bad ending. Determined to prevent this tragic outcome and protect her friend’s happiness, Bertia announces that she will serve as a stand-in villainess, taking on the role herself to divert the plot. The narrative follows Bertia’s well-intentioned but often misguided schemes as she tries to manipulate events, while Cecil quietly observes, supports, and gently steers his wife away from disaster. Their journey to Umyuve becomes a new adventure filled with misunderstandings, heartfelt moments, and the deepening of their bond as a married couple.