Through the introduction of his friend Danma Ryuji, Onizuka Eikichi, the former legendary bike gang member, visits Meishu Academy to tend to the trees in the garden as a part-time gardener. Learning that Yoshikawa Noboru, a student in teacher Fuyutsuki Azusa’s class is being bullied by Uehara Kyoko and other classmates, Onizuka befriends and saves Yoshikawa. Seeing Onizuka’s unprecedented but visceral, powerful response to problem solving, the school’s president and principal, Sakurai Yoshiko, overrides resistance from her vice principal Uchiyamada Hiroshi and makes Onizuka a teacher. Onizuka goes on to tackle many issues as the teacher in charge of the most problematic class, Class 2-4.
Onizuka realizes that Meiri is acting strangely, and asks Honami why she never comes to class. A year ago, she was in a romantic relationship with her old teacher. She was violently bullied for this incident, and stopped coming to class at all.
The new principal's son has come into the school with thugs and a grenade, for one final showdown. Will Onizuka be able to save him and his mom, too?
Doujima has been forcibly given a tattoo by his abusive father, and his mother has vanished. He gets a gun to kill his dad, and when Onizuka tries to help, he puts the gun to Onizuka's head.
Another student tries to get rid of Onizuka. Murai wants to be with Haruka, who is dating Ryouji. But to keep up with Ryouji, she has to do all sorts of bad things to earn the money.
The secret of Kanzaki's birth is revealed, and the whole school is in an uproar. Kanzaki plots her brutal revenge on the student who did it
Tomoko wants to be an idol, but she's slow and constantly screws up. With GTO's help, she enlists in a local idol competition, but it'll be tough going for her.
Meishuu Academy has a problem. Teachers are being driven away one after another by bad students. But there's a new teacher in town, and he starts by giving the vice-principal a German suplex!
The media finds out about the crazy things that Onizuka has been doing, and tries to get him fired. Before he goes, though, there is one problem to solve: the mystery behind the suicide of class 2-4's classmate.
The drama festival, where classes compete to have the best play, is coming up. Honami tells him about what happened with it last year, and he learns that Tsugumi and Nozomi of the drama club have been the leading the class the past few years. When Tomomi and Kanako find pictures of themselves that have been shot with an airgun, they blame the military-loving Numajiri, and ruin his airgun with a cruel trick. Numajiri decides to take revenge.
Basketball ace Serizawa goes to the doctor with a nasty headache and finds out he has a chronic subdural hematoma. He's told he'll be fine if he's careful, but instead he rushes back to play basketball.
The battle to get rid of Onizuka begins as Miki Katsuragi skips school. When Onizuka comes to get her, she accuses him of kidnapping!
A new principal has come, and she's taken over the school and imposed harsh discipline. She threatens to undo everything that Onizuka has done so far, and forces him to quit.
The class gives up on trying to get rid of Onizuka and turns their attention to Fuyutsuki. They give her a laxative and lock her in the bathroom, then poor cold water on her head. She's ready to quit, but Onizuka has other ideas.
Le manque de qualifications d’Onizuka pour enseigner font tout à coup surface et il se voit contraint de faire ses preuves lors d’un examen national. Kanzaki, le génie de la 2-4, se met en tête de l’aider à réussir
Director Sakurai takes Ayuna to the hospital with bad stomach pain. She's been hiding the fact that she's still pregnant from everyone, including her boyfriend. Meanwhile, Honami learns her brother, Sawamura, was best friends with Onizuka 10 years ago, before he died.
Satsuki Yurihara of Class 2-A meets an attractive young man on the beach named Nori, and falls in love. She breaks up with her boyfriend Tokuyama, a fellow classmate, immediately, and it falls to Onizuka to calm him.
Videos of a mysterious female singer are becoming popular. The class becomes excited when they realize it's their fellow student Hiiragi. Hiiragi is the oldest of four siblings who lost their father at a young age, and has taken care of the children while her mother works. She tries out for an audition to become a professional singer, but her mother is opposed to it.
Ayuna decides to have the baby, and Onizuka and Honami decide to support her. But Oomae says that if she has the baby it will damage the school's reputation, and threatens to expel her. Ayuna says that she will protect the life she's carrying to the end, and will quit school to raise the child. When Director Sakurai hears this she has an idea...
Taichi Usami of Class 2-A has been diagnosed with ADHD. His father decides to transfer him to a school with a support program for students with disabilities against the wishes of his mother. The school has a dorm and Taichi will have to live away from his family. Onizuka is opposed to this, but a shocked Taichi starts attacking his classmates, and his father becomes even more determined to transfer him.
The class is starting to revolve around Onizuka and Honami is upset that she isn't getting closer to the students. She finds Kazuki sitting by the beach, and when she talks to him he tells her that his girlfriend Ayuna is pregnant.
Kiritani was the ace of the basketball team like Serizawa, but he suddenly decided to quit and hang out with a group of thugs. He no longer gets along with his former classmates. Onizuka speaks with his father to find out why, but then he gets word that Kiritani has been arrested.
High school teacher Eikichi Onizuka (AKIRA) is sent to his alma mater of Shounan, which has been purchased by Meishuu Academy. He reunites with his former teacher Fuji, and enjoys his old school, but Director Sakurai tells him she wants him to go on a rampage. It seems like her words mean something...