Be-Bop High School

In Japan, the country that inspired the slogan "Born to be Mild," the blood of young men still runs hot. In the old days they'd go off into the country and hack each other up with swords, but these days, what with school, that isn't very practical. So some of them do something very un-Japanese. They strap on a big bike, roar around annoying people, and pound anyone they consider dishonorable. Now meet Eguchi Yousuke, leader of a high-school Biker gang AND the school's handicrafts club. Which means he divides his time between fistfights and fancy needlework. And if you think he's weird, wait until you meet the rest of his gang... (Source: AniDB)

This anime is about two students who are tired of being normal and unpopular at their old schools, after they both transfer to a new one they try to change that by deciding to become delinquents. After a rough start they become friends and the righteous Itou with the cheater Takashi start their (dis)adventures trying to survive the other delinquents from both their own and other schools.

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)

Continuing where season 1 left off, everyone in Class F is bemoaning the horrible equipment they have. There is a school festival going on though, and if they make enough money they'll be able to buy better school supplies, and as always Akihisa is ready to do anything that might help out Himeji. This is especially important though, because Himeji's father is worried about her placement in Class F and is thinking about transferring her to another school. (Source: Anime News Network)

Kazama Kenji likes to believe he is something of a delinquent. Moreover, others seem to like to agree that he is. Of course, Kenji's gang finds their way to a group of four not-so-normal girls—Chitose, Sakura, Minami and Roka—and all at once, whatever reputation he may have is nothing compared to the outrageous behavior of the girls. Shanghaied into joining their club, what will happen to his everyday life from that point on?

At Kaimei High School, the Living Assistance Club (aka the Sket Brigade) was organized to help students with problems big or small. Most of the time, though, they hang out in their club room, bored, with only a few trivial problems floating in every once in a while. In spite of this, they still throw all their energy into solving these worries. (Source: Crunchyroll)

When tragedy struck Riki Naoe as a child, he was rescued from grief over his parent's deaths when four other kids "recruited" him for their group—the "Little Busters." Now in high school, Riki and the other Busters are still fast friends, and though their vision of being heroes for justice may have faded, they'd still do anything for each other. Which is why Riki is now on TWO special missions. The not so secret one: recruiting new members so the Busters can form a baseball team. Preferably FEMALE recruits, as the current dude/babe ratio is an inconvenient 4 to 1. The OTHER mission, though... That's the strange one. Because Riki and Rin, the group's singular girl, are receiving odd messages, delivered by cats, concerning the existence of a "secret world" and assigning them tasks they

Welcome back to Furin High School, an institution infamous for its population of brawny brutes who solve every conflict with a show of strength. Some of the students even formed a group, Bofurin, which protects the town. Haruka Sakura, a first-year student who moved in from out of town, is only interested in one thing: fighting his way to the top! (Source: Crunchyroll, edited)