Top student Wang Fei has always dreamt about becoming a Judge, a pillar of light and justice for the people! However fate isn't on his side and he ends up going to a high school for delinquents. How is he going to survive? Will he rise to the top or be gobbled up in the chaos of the hell that is Shiji High School?

From MangaHelpers:
Kuroba Yo is a sadistic detective who enjoys nothing more than destroying his targets emotionally and psychologically through his deductive reasoning. Toiro Arata is a naive and slightly masochistic boy who gets duped by Yo into becoming his assistant, or slave. These two team up to become the "Black & White" detective, solving crimes and chasing after criminals.

A terrible creature has been plaguing the community: a man with a fishbowl for a head. When he attacks someone, the goldfish leaps out of his bowl and drinks their blood. The victim is irreversibly transformed into a goldfish! This terrible crime has happened to high-schooler Kousuke's little sister. With no other option, he takes care of his goldfish-sister as best he can.

One day, he comes across a strange girl named Ringo, who wears a school swimsuit, carries an umbrella, and keeps a gun hanging around her neck. Ringo is an apprentice blood diver, and the gun is her way of shooting herself into the wounds of the fishbowl man's victims. If she can get to them in time, she can prevent them from turning into goldfish. Ringo's mentor, Ichigo, says that she's heard of a way to turn people back from goldfish into humans. Kousuke is determined to help Ringo find a way to help his sister and the loved ones of his friends at school who have met the same fishy fate!

A direct continuation of Chimoguri Ringo to Kingyobachi Otoko.

Aoi Hana is a normal female high-school student, though she is extremely clumsy and thus tagged as good-for-nothing. But Hana wants to change herself and decides that finding a part time job would be taking the first step in that direction. Being an animal lover, Hana's job of dreams is encountering animals day-to-day and taking care of them - the zoo sounds like the perfect place for that. So when she happens to see a job offer from a local animal park it's settled she'll attend a job interview.
When Hana arrives at the zoo everything seems just fine. The "Oumagadoki Zoo" might be going south but altogether it's your regular animal park. Just a very normal zoo, one might think. But that is only until Hana gets to meet the zoo director...

The plot begins when Moritaka Mashiro, a junior high student, forgets his notebook in class. His classmate, Akito Takagi, notes Mashiro's drawings in it and asks him to become a manga artist to his stories. Mashiro declines, citing his late manga artist uncle, who died from overworking. Takagi incites Mashiro to meet with Miho Azuki, Mashiro's crush, and tells her the two plan to become manga artists. In response, Azuki reveals her plans to be a voice actress. Mashiro proposes to her that they should both marry when Azuki becomes a voice actress for the anime adaptation of their manga. The two then start creating their manga, under the pen name Muto Ashirogi, in hopes of getting serialized in Weekly Shōnen Jump.

Nominated for the 3rd Manga Taisho Award (2010).

Haru Okamoto, a teenage girl who adores katana, is just now entering high school. When she was little, she happened upon a katana in her grandparents' house. In their haste to get the blade from her, they agreed that when she was an adult, the katana would be hers. However, to her dismay, they do not agree that a 15-year-old, immature, excitable Haru is an adult! Luckily, she finds another outlet for her love of Japanese swords, the almost-defunct high school Iaido club! As Haru searches for new club members and tries to get over her fear of boys, she will become aware that her affinity for Japanese swords has a deeper source than she could have imagined!

From MangaHelpers:
Siblings Ayane and Kurumi have unique supernatural powers known as Ghosts, each with their own unique rating that designates their powers. Ayane has a score of 7, while Kurumi has a score of 11. Ayane's ability allows her to control shoe laces, while Kurumi can form contracts with objects, which allow her to control them. Ayane feels severely inferior to her sister, but will she be able to prove herself against the other Ghost-bearers in combat?

N/A

Two siblings making their way through a world rife with atrocities…

It's Toilet Girl Hanako. Yes, she's a walking, talking toilet.

Centuries in the future, in the year After Colony 195, Earth is surrounded by orbiting space colonies. The colonists are cruelly oppressed by the Earth Alliance, which uses huge humanoid fighting machines called "mobile suits" to control the populace. Behind this tyranny is the secret society called "Oz," which has infiltrated the Alliance military and steered it towards its repressive course. Now, the space colonies are ready to strike back. Five young pilots, equipped with advanced mobile suits called "Gundams," are sent to Earth to wage guerilla war against Oz and its Alliance puppets. The war to decide humanity's destiny begins...

The story is set at Shishidou, a school attended by rich and elite people. Tomu Shirasagi, a gambler, is a mysterious new transfer student who has come from a public school (instead of a prestigious private one) and faces the elitist environment. There, he declares a challenge toward any student and claims he will bring to the ruin the whole school through a series of gambling matches. Nobody knows why he has come to that school or what the real motivations behind his actions are.
During any match, Tomu shows off all of his unique coolness and ability.
He employs a wide range of tricks, both psychological and physical, to ensure his victory. In any game, you will constantly ask how he's planning to win, why he's really doing certain things, and what's really going on. At the end of the matches, the tricks are revealed, and they all work in real life, even if they do require one to be highly skilled or lucky in order to perform them.
The story centers around the various matches he undertakes and the interactions between the various characters, like Mika Shishidou, the beautiful granddaughter of the school headmaster, who is highly intelligent but contemptuous and superb, or Abidani, the vampiric looking dorm superintendent and main villain (for now) in the series, who has a sadistic personality and whose goal is to make Tomu leave his school (or to get him killed).
As the story unfolds, more about Tomu's past is revealed, leading to unpredictable turns of events.

Three boys are desperately struggling to "make" a girlfriend in their sad adolescent lives. They then realize that their classmate, Ghang Han-Gyul - the manly, serious, quiet person of their class - has been secretly going out with a beauty for 100 days*. This triggers the friendship between the manly, serious Han-Gyul and the three dateless losers. *A 100 day celebration of a relationship is seen as very significant.

Mogami Himoto shouldn't have any problems. He's rich. He's smart. He's athletic. He's incredibly attractive. He's an "ikemen."

Meeting Yaenami Yukka plunges his life into chaos. First, she mistakenly accuses him of molesting her and broadcasts the news to the whole school. Then she ropes him into pretending to be his fiancee... which might not be so bad if not for the self-defense mechanism which results in her punching any ikemen who comes close to her. And then there's the curse...

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From DeNA:

Our protagonist Haruka has been given the gift of precognition. He’s led an ordinary life so far, without really giving question to his special ability. However, one day, he foresees someone close to him die in an accident while travelling. It’s only after he sees this insufferable vision that he gathers the determination fight against the future, but… in such an unthinkable way. What will the future hold after Haruka rises up against a fate that’s already been decided…?

Ellis, a young girl with a bounty on her head, finds herself travelling with the bounty hunter Nadie.

Together the pair head towards the mysterious city of Winay Marka, which holds the secret to Ellis' past.

The story explores the real-life events that built the fighting game community, and the strategies and play styles developed by Daigo and his fellow gamers. In Volume 1, Shinya Ohnuki, a gamer with prodigious talent, is drawn into the wild and wonderful world of fighting games after a chance meeting with Daigo. As they face off in iconic games like Street Fighter II, Street Fighter Alpha, and Darkstalkers, an enduring rivalry between Daigo and "Nuki" is born!

Gosh?sh?-sama Ninomiya-kun's story revolves around Shungo Ninomiya, a male high school student trained in difficult hand-to-hand combat. He lives in a huge house with his older sister Ry?ko, who is almost always gone on some dangerous mercenary mission. One day, his sister sends Mayu and Mikihiro Tsukimura, two siblings, to live with him to help Mayu overcome her fear of men. Unfortunately this is accomplished by making Mayu and Shungo share the same room, bathe together and even sleep together in the same bed. Making things even worse, Reika H?j?, the student-council chair, is blackmailed into becoming their maid due to a video that Ryoko recorded, in which she tries to seduce Shungo. ~from Wikipedia From Baka-Updates: Shungo is a normal high school student living in a huge house. One day, his sister Ryoko sends Mayu and Mikihiro Tsukimura, two siblings, to live with him to help Mayu overcome her problem. Mayu's problem: androphobia (fear of men), and Ryoko wants Shungo to help her overcome it. How? By making Mayu and Shungo share the same room, bed, and even take baths together. To make things even worse, Reika Hojo, the student-council chair, somehow ends up becoming their maid.

What if all the nursery rhymes you heard as a child were real - and more importantly, what if they were all out to kill you?