Sixteen-year-old Seohyun transfers to the illustrious UA High School in Japan, renowned for training the world's most promising superheroes. Despite her outward calm and polite demeanor, Seohyun harbors a dark secret. At the age of three, she was subjected to horrific experiments designed to turn her into a living weapon, an ordeal that ended with the destruction of the laboratory and the tragic loss of her brother. Now, years later, Seohyun's quest for vengeance has led her to UA. Here, she must balance her dual life-attending classes and learn what it means to be a hero, while secretly hunting for the mastermind behind her childhood torment. With each lesson and every new friendship, Seohyun gathers clues, inching closer to her target. As she navigates the challenges of UA, Seohyun discovers that the path to justice is more complicated than she ever imagined. In a world where heroism is celebrated, her personal vendetta remains concealed, a hidden shadow in the bright halls of the Hero Academy. Will she be able to maintain her facade and fulfill her mission without losing herself in the process? The answer lies in her courage, her wit, and the unwavering memory of her brother's sacrifice. Some of the characters and story plot are not mine.