Cromartie High School

Is this the real life? Is this just fantasy? The only thing for certain is that for Kamiyama, Cromartie High School is his reality. And what a surreal reality it is. Because this is where the toughest, meanest (and often dumbest) students are sent to do time. At Cromartie, purple-mohawked bruisers and pencil-chomping street thugs are just part of every day life. And so is a 400-pound gorilla. And a macho brute named Freddie who travels with his own theme music. And, of course, Mechazawa, the student voted most likely to need an oil change. So pack your bags, put on your best tough-guy swagger, and get a lesson in insanity from the hilarious losers at Cromartie High. This is one class you won't ever want to cut. (Source: Discotek)

Be-Bop High School

For the invincible and basically happy punk lads Hiroshi and Toru, what they care about every day is to get a lot of attention from girls and to win the fights against the lads from other schools. Whenever provoked, they just go out fighting and settle the situation no matter what it costs. (Source: AniDB)

Beelzebub

Oga Tatsumi is a first year student in Ishiyama High, a notorious school for delinquents. One day he sees a man floating by, and the man suddenly splits in half to reveal a baby boy inside! (Source: Crunchyroll)

Sakigake!! Otokojuku

Otokojuku - a private school for juvenile delinquents that were previously expelled from normal schools. At this school, Japanese chivalry is taught through feudal and military fundamentals. Similar to an action film, the classes are overwhelmed by violence. Only those who survive it become true men. (Source: Anime News Network)

Tokyo Revengers

Takemichi Hanagaki is a freelancer that's reached the absolute pits of despair in his life. He finds out that the only girlfriend he ever had in his life that he dated in middle school, Hinata Tachibana, had been killed by the ruthless Tokyo Manji Gang. The day after hearing about her death, he's standing on the station platform and ends up being pushed over onto the tracks by a herd of people. He closes his eyes thinking he's about to die, but when he opens his eyes back up, he somehow had gone back in time 12 years. Now that he's back living the best days of his life, Takemichi decides to get revenge on his life by saving his girlfriend and changing himself that he'd been running away from. (Source: Crunchyroll)