Rayanne McEllion, the girl who wanted to avoid a bad end, willingly went to the insomniac emperor in place of her sister, Raylin. She is tasked to help the sleepless emperor, who was cursed by a witch, by using her ability to induce sleep whenever she touches another person's body with her lips. Can Rayanne survive being with the emperor, ‘Kael Rue Kaldorf?' I'll Do That Marriage / That Marriage, I'll Do It! / 그 결혼 제가 할게요 / I'll Marry Him!