GuessAnime.

7. Crows Gaiden: Katagiri Ken Monogatari

This Crows gaiden follows Katagiri Ken when he was still a student at Suzuran High.

Crows Gaiden: Katagiri Ken Monogatari is finished and has 1 Volumes and 4 Chapters. It is also Known as: クローズ外伝 片桐拳物語, Crows Gaiden: Katagiri Ken Monogatari

6. A-bout!

Mitsumine High School is known as the school with the most juvenile delinquents in the country. The students are so violent that even the teachers are scared for their lives. Sunahara is the leader of the first years and is the strongest dude of his class. But when the transfer student Asagiri Shinnosuke makes an appearance at the school, he starts taking down names and kicking up dust like a tornado. If the students thought things were violent and unpredictable at Mitsumine, they haven’t seen anything yet since Asagiri is here to become the champion of the school.

A-bout! is finished and has 19 Volumes and 165 Chapters. It is also Known as: アバウト, About!

5. Crows

Harumichi Bouya transfers to a Suzuran mid-year, but this isn't just any school, it is know as Crow High where all the delinquent students go to. Bouya just wants to be the number one fighter in school and in doing so he sets off a chain of events of high school gang warfare in the area.

Crows is the prequel of the manga "Worst", and it a story occurring in Suzuran two years before the story of "Worst."

Crows is finished and has 26 Volumes and 95 Chapters. It is also Known as: クローズ, Crows

4. Kyou kara Ore wa!!

After Takashi's family moves into a new neighborhood, he decides to use the opportunity to become a delinquent. Upon meeting Itou, he finds out that he wasn't the only one who had this idea. Making friends and foes along the way, will these two take over their school or just end up as wannabes?

Kyou kara Ore wa!! is finished and has 38 Volumes and 366 Chapters. It is also Known as: 今日から俺は!!, From Today On, It's My Turn!!, Today, It's My Turn!!, Today

3. GT-R

Being one of the few longtime friends with Onizuka , Danma Ryuji has seen all the fiascoes he has gotten into. But the motorcycle shop owner and self proclaimed fastest driver in the city is about to get into a world of trouble. A hot teenager named Ishikawa Mimon starts taking interest in Ryuji, but contrary to her appearance, she's a dangerous person that will put Ryuji into life threatening situations. Even though he has a beautiful girlfriend named Nagisa, Mimon is about to wreak havoc in Ryuji’s peaceful life.

GT-R is finished and has 0 Volumes and 15 Chapters. It is also Known as: GT-R ジーティー・アール, GT-R: Great Transporter Ryuji

2. Worst

Hana Tsukishima is a country boy that recently moved to city. He is a good guy, ingenuous and honest, but he is also very strong. His goal is to become the "strongest student" of a school of thugs led by clan-logic, strength hierarchy and fights.

Worst is finished and has 33 Volumes and 131 Chapters. It is also Known as: WORST ワースト, Worst

1. Kiku

Endou Kiku, a delinquent lone wolf, is pissed off with the world and everyone in it. Until he meets Senji and Sanji, who were just like him until they met each other. This one volume story follows Kiku as he finds out what it means to have friends and not be alone in the world, while also kicking ass and taking names in the meantime. This is the original Takahashi Hiroshi delinquent manga, predating his more famous works Crows, QP and Worst.

Kiku is finished and has 1 Volumes and 7 Chapters. It is also Known as: キク, Kiku