This family can solve problems effectively and hold operational meetings in secret family meetings. Here, "family happiness" takes precedence over law or common sense. Kitazawa Hidesaku (Ryosuke Yamada), the second son of the Kitazawa family, is an elite cadre candidate of the Metropolitan Police Department. He is affiliated with the Police Department and studies day and night for the promotion exam in order to become the future director of the Metropolitan Police Department. But his shortcoming is that he has a strong sense of justice. The eldest daughter Chiaki (Haru) is a promising lawyer with both talent and beauty. She has a proud mind and eloquence and is the "brain of the Kitazawa family." Like Hidesaku, she has an extraordinary sense of justice and a "unique" judgment ability that ordinary people cannot understand, and often does things that make people around her stunned. The eldest son Hirofumi (Masaesu Ozawa) is a young heart surgeon known as a genius. He is deeply trusted by his subordinates and has long been rumored to be the future successor to the dean. The only flaw is that he is too narcissistic. The three elites, police, lawyers, and doctors, gathered together will surely solve all problems quickly. But under the oppression of his overly strong-willed older brothers and sisters, Shusaku, the youngest, was always implicated. The father who raised them was the principal of the private middle school Kitazawa Gakuen, Taizo Kitazawa. After he wrote a book about how to send all three siblings to the University of Tokyo and it became a bestseller, the number of applicants to Kitazawa Gakuen increased dramatically, and he became a famous operator of a private middle school that was difficult to get into. However, as a successful educator, he had some secrets that he couldn't tell anyone.