Kazuhiko Kogure, who is a 2nd grade student in middle school, falls off from one of the school's rooftop. There were other male students on the roof when Kazuhiko Kogure fell off. According to the other students there, Kazuhiko Kogure tried to jump to another school building, but missed. Fortunately, Kazuhiko Kogure only fractured his leg and ribs. According to Kazuhiko Kogure's mother Hidemi, the school insists it was students playing around and did not involve bullying. Hidemi though, doesn't believe it, because Kazuhiko Kogure has a fear of heights. Hidemi goes to see attorney Machiko Mayuzumi and Machiko decides to take her case, but she asks for fellow attorney Kensuke Komikado's help. Meanwhile, the school hires attorney Teshigahara Isao.

Of all the law related dramas inside and outside of the country, a majority of lawyers are depicted as heroes, either bringing tears to your eyes helping the weak underdog, or trying to advocate justice to the extreme. This has led the general public to view lawyers with eyes of respect and envy.

However, the main character of "Legal High!!" stands miles away from that stereotypical identity of a lawyer. Komikado Kensuke is stubborn, abusive in his language, sarcastic, moody, and an extravagant spender. To the contrary, he has never lost a case in his life. A genius at bargaining and building strategy, winning is everything to Kensuke. His love for money, fame, and women obviously collects the dislikes of other professionals in the field. Kensuke loathes the textbook of justice the young lawyers try to brandish.

Unexpectedly, Mayuzumi Machiko is a lawyer who passed her bar exam through hard studies. She is overly earnest in her mission of saving the weak, and rather clumsy and incapable of planning ahead. Her lack of versatility and strong righteousness drives her reckless, without compromise to her convictions. Passionate and determined, she is the complete opposite of Kensuke's character.

"Justice is the winner," Kensuke stands by this belief without doubt. Despite the skepticism he receives for his sensational efforts, the people surrounding him begin to see that their view was but a pipe dream. In the courtroom, Kensuke reminds us of the feeling we had all forgotten: To fight with all our energy and to never give up.

Komikado-sensei is back!! And together with him, Mayuzumi and Hattori. This season, a new employee joins their team. Hanyu Haruki comes from a rich family. His father owns a highly profitable trading company, while his mother is a children's books writer. Hanyu has lived in England, Saudi Arabia and USA, before returning to Japan to sit for his bar exam. After finishing his apprenticeship, he joins the Public Prosecutor department. To broaden his experience, Hanyu is loaned out to Komikado's law firm.