This drama tells the story of a female high school lawyer, Sakuragi Masa, who has been strictly trained by her grandfather since she was a child. After passing the judicial examination, she became the youngest female high school lawyer in history (JKB). Afterwards, she came to Tokyo and interned at her grandmother's law firm. Because of her strong personality, she often clashed with senior lawyers. But despite her innocence, she always showed her mature side in court and instilled correct theories with enthusiasm. At the same time, she is also an ordinary child. Her new school life, which concealed her title of lawyer, was not smooth, but she gradually adapted and accepted consultations from her classmates as a lawyer. As a hybrid drama of "law × campus", it shows Xiaoya's struggle and growth in court and school.