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)

D-Frag!

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?

Gintama Season 3

While Gintoki Sakata was away, the Yorozuya found themselves a new leader: Kintoki, Gintoki's golden-haired doppelganger. In order to regain his former position, Gintoki will need the help of those around him, a troubling feat when no one can remember him! Between Kintoki and Gintoki, who will claim the throne as the main character? In addition, Yorozuya make a trip back down to red-light district of Yoshiwara to aid an elderly courtesan in her search for her long-lost lover. Although the district is no longer in chains beneath the earth's surface, the trio soon learn of the tragic backstories of Yoshiwara's inhabitants that still haunt them. With flashback after flashback, this quest has Yorozuya witnessing everlasting love and protecting it as best they can with their hearts and souls. Gintama'</i>: Enchousen includes moments of action-packed intensity along with their usual lighthearted, slapstick humor for Gintoki and his friends. (Source: MAL Rewrite)

Okami-san and Her Seven Companions

Ookami Ryouko is a spunky and, by some accounts, rather manly high school girl. She is tall, speaks in a traditionally masculine way and is very proficient in fighting. Ookami-san's best friend is the small and high-pitched voiced Akai Ringo. Incidentally, the two are rather flat-chested, a fact the Narrator (voiced by Arai "Kuroko" Satomi of Railgun fame) is all too eager to point out. Ookami and Ringo are members of the Otogi Bank, a club in Otogi High School that assists students with their problems in return for their assistance on a different problem at a later date; thus the Otogi Bank is effectively a loan institute for problems where you can take out a loan for a solved problem but you have to repay it sooner or later. The Otogi Bank is able to solve any problem and will go to any lengths to do so, often leading the members to danger or mayhem. Since most of the members of the club are female, another male is needed for the more dangerous assignments. Thus, the scopophobic (the fear of being looked at) Morino Ryoushi is inducted as a member, right after he confesses his love for Ookami...

Bakuman.

Moritaka Mashiro and Akito Takagi are pretty much foils of each other. Mashiro, an average 9th grade student but talented artist, and Takagi, an overall advanced 9th grader and aspiring writer. After great convincing, Takagi convinces Mashiro to join him in becoming the greatest mangakas Japan has ever seen. Takagi, with his gift of writing, hopes to become a successful mangaka, and Mashiro, with his gift of art, hopes to marry the girl of his dreams, Azuki Miho. (Source: Anime News Network)

Gintama.: Slip Arc

Consists of episodes animated from unused manga chapters, before returning to the Silver Soul Arc on January 8, 2018. Porori is an Onomatopoeia for something (mainly water) falling.

Azumanga Daioh

Ten year old child prodigy, Chiyo Mihama, is finding it tough fitting in at high school with the girls five years her elder: Osaka (dimwitted with a weird take on the world), Tomo (a powder keg that goes off at a moment’s notice), Kagura (the competitive athlete of the bunch), Yomi (the hothead), and Sakaki (timid and obsessed with a love of animals that isn’t reciprocated). Together with their teacher, they navigate the rough waters and fun times of high school. (Source: Sentai Filmworks)

Haven't You Heard? I'm Sakamoto

First year high school student Sakamoto isn't just cool, he's the coolest! Almost immediately after starting school, he began attracting everyone's attention. The girls love him, and most of the boys resent him. There's even a boy in the class who works as a model, but who is constantly upstaged by Sakamoto! No matter what tricks the other boys try to play on him, Sakamoto always manages to foil them with ease and grace. Though Sakamoto may seem cool and aloof, he helps others when asked, such as in the case of the boy in his class who was being constantly bullied. No matter what difficulties Sakamoto encounters, he moves through his high school life with confidence and class! (Source: MangaHelpers)

School Rumble

Tsukamoto Tenma is an ordinary 2nd year high school student who has fallen in love with one of her classmates, Karasuma Ooji. However, currently she is unable to confess her feelings to him. To make things worse, she found out that Karasuma is transferring to another school in a year. On the other hand, Tenma's other classmate, Harima Kenji (who is a delinquent) is also in love with Tenma. Not being able to confess his feelings, Harima gets depressed day by day. (Source: Anime News Network)

Code Geass: Lelouch of the Rebellion

On August 10th of the year 2010 the Holy Empire of Britannia began a campaign of conquest, its sights set on Japan. Operations were completed in one month thanks to Britannia's deployment of new mobile humanoid armor vehicles dubbed Knightmare Frames. Japan's rights and identity were stripped away, the once proud nation now referred to as Area 11. Its citizens, Elevens, are forced to scratch out a living while the Britannian aristocracy lives comfortably within their settlements. Pockets of resistance appear throughout Area 11, working towards independence for Japan. Lelouch, an exiled Imperial Prince of Britannia posing as a student, finds himself in the heart of the ongoing conflict for the island nation. Through a chance meeting with a mysterious girl named C.C., Lelouch gains his Geass, the power of the king. Now endowed with absolute dominance over any person, Lelouch may finally realize his goal of bringing down Britannia from within! (Source: Bandai Entertainment)

REBORN!

Nowadays, the mafia world is ruled by Italy's strongest family, the Vongola. Vongola's current head, ninth in the row, is an old man ready for retirement. But before he can hand down his position, he needs help from a professional Hitman to prepare the next generation Boss for ruling over Vongola and the mafia world itself. Sawada Tsunayoshi is just your ordinary teenage boy who attends Junior High and sucks at it. He is unpopular, has no friends, and is desperately in love with a girl from his class. But his life takes an extraordinary turn when Tsunayoshi meets Reborn, an infamous hitman, who the ninth boss of Vongola has sent to train Tsunayoshi for his upcoming title. (Source: Katekyo Hitman Reborn! FC)

Kyou kara Ore wa!!

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.

Fairy Tail

Across the Fiore kingdom, wizards join guilds and make their pay by filling magical needs—but one guild has a reputation as the roughest, rowdiest, most dangerous of all: Fairy Tail! When four young Fairy Tail members unite, their bond is forged by a power found in neither muscle nor magic and grows stronger with every mission. Whatever you do, don't mess with these friends or you'll get a taste of Natsu's flaming fist or Gray's ice hammer, suffer a painful blow from one of Lucy's celestial spirits or catch the edge of Erza's mighty blade! Whether they're stopping demons from devastating the world or wrestling in the mess hall, this mystical team manages to inflict as much damage to their rivals as they do to the surrounding area! (Source: Funimation)

Yamada and the Seven Witches

Ryu Yamada is a second year student at Suzaku High. Ryu is always late for school, naps in class and gets abysmal grades. His life is a dead bore. The beautiful Urara Shiraishi, on the other hand, is Suzaku High's brightest student. One day, without explanation, their bodies are swapped! Ryu ends up in Urara's body, and Urara in Ryu's.

Air

Yukito Kunisaki is on a journey in search of the Winged Maiden who was bound to the sky centuries ago, after hearing an old childhood tale from his mother. As Yukito shows his puppet show to people in an attempt to make some money, he finds himself in a small town in which he did not expect to stay very long. However, when he meets an unusual girl named Misuzu, things take a drastic turn as he is invited to stay with her. By staying in the quaint town, Yukito soon becomes friends with the locals. As he gets to know them better, he learns of their problems and decides to help, putting his search for the Winged Maiden on hold. With his search on hold, and his growing attachment to Misuzu and the small town, will Yukito ever find the Winged Maiden, or is she closer than he thought? [Written by MAL Rewrite] Note: Includes episode 13, Soushuuhen (Summary).</i>