Discover the intriguing narrative of 'Became the Only Daughter of the Northern Grand Duke,' a Korean web novel that delves into the protagonist's transformation into the only daughter of a grand duke. Unravel the mysteries of why she is perceived as a villainous young lady while immersing yourself in a blend of action, adventure, comedy, drama, and fantasy. With elements of ecchi, gender bender, harem, and yuri, this story explores themes of transmigration, nobles, and academy life from a fresh perspective.