Based on the plot of an award-winning Crayon Shin-chan animated movie from 2002, a boy named Shinichi (Takei) does the time-traveling and meets a feared general named Ijiri Matabei (Kusanagi). Ijiri is in love with Princess Ren (Aragaki) who subsequently rejects an arranged marriage to Okura Itakatora (Osawa), a powerful daimyo of northern Kanto. Enraged by the rejection, Okura sends a large army to Ijiri's smaller state and it's up to Shinichi to change their destiny.

A 16-year-old boy, Marcus Daimon, an undefeated street fighter, meets Agumon, who has escaped from the Digital Accident Tactics Squad (DATS), a secret government organization set up to defend the human world from invading wild Digimon. After fighting each other, the two quickly become friends, and through a series of events, are inducted into DATS, where they hope to grow in strength.

Makio Kōdai is a shy 35-year-old woman. She works as a novelist. One day, her sibling and her sibling's married partner die in a car accident. Makio Kōdai attends their funeral and meets her 15-year-old niece Asa Takumi, who is now left alone due to her parents’ death. The other relatives at the funeral speak insensitive words around Asa Takumi. Makio Kōdai gets furious at them and decides to take in her niece. Makio Kōdai, who has problems having relationships with other people, and Asa Takumi now begin to live together.

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.