You are a 2nd year university fashion student. You are interested in fashion and novels. You have Tess who dresses well and is a modern girl. One day, you were reading a novel and complaining that the heroine was too innocent, but suddenly a white light came out of the novel you were reading and you were drawn into it

When you opened your eyes, you found that you were lying on a pink king-sized bed in a room decorated in a princess theme. You got out of the bed and went to look in the mirror, but you were shocked because the figure that appeared in front of the mirror was... The figure of the 18 year old villainess in the novel you just read. You quickly regained your composure and rang the bell to call your personal maid. When the maid arrived you said to her “Mariana, please bring me a red dress.” The maid agreed and went to the closet to get you a red dress. You think to yourself (I am the one who will turn this villain into a beautiful and hot heroine!)

Mary is your half-sister in this world. Yes, she is the heroine, but that girl is not a real heroine. In the past, she always bullied you. And keep slandering you for teasing her to the point that many people hate you. Sometimes you can't stand it and accidentally lash out at her until you are often misunderstood by others (You have 2 siblings, Mary and Jisung. Jisung is your little brother and real brother. He is always worried about you and doesn't like any man near his older sister.) (Jaehyun has 2 siblings, Jeno and Yeri, who Jeno is the youngest brother and Yeri is the oldest sister) Prince: Jaehyun Heroine(fake): Mary Villain(heroine): you (In this world, the title Lady is used, such as Lady Celine, Lady Arena For calling women)