From Yen Press:
Michiru Kita’s a weak-spirited girl who has a hard time saying what’s on her mind. One day, she notices mysterious, ring-like markings around the necks of two of her classmates, Chika Akatsuki and Shito Tachibana — two boys who miraculously survived a horrible accident six months before. Michiru, possessing the rare ability to see these rings, knows that they warn of impending death. Thinking that, perhaps, she can do something to save her classmates’ lives, she approaches them…but it seems the boys have already made a different kind of deal and garnered themselves a heavy debt.

The male lead has gynophobia (fear of woman) due to a traumatic experience. Following the recommendation of his sister, who is a nun with little brother-complex, he enters a previously all female school that now has a 9:1 female to male ratio. Then the queen of the school demands that he work for her as her secretary! How will the gynophobic guy cope working so close to the queen?

A samurai manga about a boy named Zan. Zan's father was a legendary swordsman who used a sword which had no blade (think Sakabatou from Ruroken). Zan's father died one day, and ever since, Zan has wanted to follow in his fathers footsteps.

The manga starts off with Zan being transfered to a new high school in his second year. When pushed, Zan somehow becomes super strong and has incredible sword technique that allows him to beat his enemies.

Rikuo Nura is descended from Nurarihyon, Grand Master of the spirit world, but appears to be just a normal kid. He usually just wants to live peacefully as a human, but when his friends and allies are in trouble, his spirit blood boils, and he transforms into Nurarihyon to wipe out evil! A new concept story combining spirits and chivalry! A piquant, gallant ghost action story!

Student Council President Yuushiro Seiji launches an investigation into a string of serial arson at Sakuragazaka High School. His only lead is the schools most fearsome delinquent Kazunagi Soyono, who was present at each incident. But, when Soyono discovers Seiji's dark secret he's forced into a dire position. Either clear Soyono's name or lose his position as President. The problem is that Soyono may not be as innocent as she claims to be...

When corruption consumes the world, the akuma with 101 mouths shall appear. Humanity forgot about their existence, continuing to indulge in sin, until the day when the akuma arrived, and dark descended. Some continued to fight, and after seven days of struggle the akuma was destroyed. Or so they thought. Immortal men marked by the "mouth of the akuma", continue to wander the world. A man bearing the mouth of the akuma, named Godot, has blackmailed a town, extorting food and supplies, and in exchange promises not to harm the inhabitants. One day a man appears, also bearing the mouth of the akuma, accompanied only by a young girl named Haru, whom he calls his sister. Claiming to be an akuma eater, he promises to rid the town of Godot once and for all. Who is this young man, and what are his intentions? How does he plan to kill his fellow immortal, Godot?

Akagi, after being rejected by a girl that he likes and punched by a rival, Rukawa, for accidentally stepping into his confession moment with the girl, wants revenge against Rukawa for various reasons. He and his teammates decided to challenge Rukawa and his team against a game of basketball in the regional tournament. Who will win this basketball game?

Based on the popular PS2 games is Star Ocean the End of Time. Twelve heroes thwarted the Ten Wise Men's plot to destroy the universe. Four hundred years have since passed. The date is SD 772. The Pangalactic Federation has already explored one third of the Milky Way, and continues to research in its insatiable quest for even more power. In that time, the young Earthling Fayt Leingod and his family visit Hyda, a resort planet in the Pangalactic Federation when, suddenly, an unknown military space force attacks Hyda. The assault leaves buildings destroyed and the resort's natural surroundings in ruin. Amidst the chaos, Fayt attempts to escape with Sophia and the other resort guests to an emergency shelter, joining his parents along the way. But even their escape route falls under attack. Fayt manages to reach the shelter, but he is separated from his parents...

Kurogane Hiroto is in high school, where he is academically the top of his class but literally the worst in physical activity. Born with a weak body, he has no endurance, speed nor strength and Hiroto wants nothing more than to be a hero. Fate teases him by giving him phenomenal eye sight, which allows him to see well beyond anyone else in sports, but his body is not able to react to any of it.

He learns from his friend Shiratori, who wants to recruit him for the Kendo team, about a rumor about a ghost named Tojo Sayuri, who wields a katana and haunts an alley in the city. Half curious, Hiroto goes there only to find that the ghost is real and that Tojo Sayuri has been looking for a successor to her Sakura sword style for 150 years. Sayuri chooses him as the successor after being able to dodge her attack and forces him to learn the Sakura style. Even with the help of the ancient swordsman ghost, Hiroto has to overcome his poor motor skills in order to be the hero he always wanted to be.

Maki-kun goes to look at the results of his high-school entrance exam results and meets a beautiful girl. Could this be a fated encounter? He's thrilled to find out that the same girl, Aikawa Kizuna, not only ends up going to his school, but is in his class. However, he's not so thrilled when he finds out that Aikawa isn't a girl! Not a girl, and not really a guy, kind of both -- and Maki finds himself getting along with popular Aikawa, getting pulled in to his pace!

From ryColaa:

Reputation is everything in a world of icons and popularity contests. So why not score some points here and there by being the nice guy? This is the way Kang Shin-gi legitimizes the fake personality he has everyone believing. Armed with his above average looks and a (completely false) angel-like personality, he has every girl in school head over heels, and all the guys looking to him for guidance. With the exception of having a screwed up cross-dressing devil for a dad, Shin-gi’s life is absolute perfection (*cough* of lies), until one day, Um Seung-hui transfers to his school.

While being a complete martial artist freak, she also likes to fib just a little in front of those who know her… you know, like acting like she's just a scared little girl who'd play with kittens rather than break brick walls with her head! After all, how can anything go wrong when you're as cute as Seung-hui?

Fate has brought these two masters of lies together, and the two must battle it out to see who will be crowned the undefeated heavy-weight champion of fakeness!

The story explains the day-to-day of a college freshman Yūta, who is just starting a new life in the School of Literature Department of Tama University. While Yūta grew up with his sister, when she married a divorced man with two daughters, Yūta left her to live by himself to distance himself from that new family.

About 3 years later his sister asked him to visit and babysit her girls. His life was turned upside down when the girls' parents went missing. Yūta now has to live with his sister's three daughters: a tsundere (Sora, 14 years old), a little demon (Miu, 10 years old) and a baby girl (Hina, 3 years old), two of which are from a previous marriage and not related by blood, in a six tatami mat sized room.

Kawakami Momoyo is a notorious, woman-chasing, large-breasted master fighter. She and her friends at school end up in all sorts of weird situations, often involving people attempting to defeat Momoyo. Now there are new transfer students from Germany joining their class. Who are these new students, and will they fit in with the crazy bunch surrounding Momoyo?

Based on the Visual Novel by Minato Soft, this manga contains several features and story lines from the Visual Novel, combining them into one while staying true to the original Visual Novel while ultimately focusing on the main heroine in true story and manga fashion.

This manga can be seen as both an alternative version of the Momoyo route of the Visual Novel, the actual story of Maji De Watashi ni Koi Shinasai or even its own story. Filled with several cameos from other creations while all the while staying true to Maji De watashi ni koi shinasai, this is one manga that fans of the Visual Novel will not want to miss!

The manga is based on THE iDOLM@STER music rhythm game, in which the player guides nine idol singers as their producer. (from Animenewsnetwork)

A boy and his senpai get kinky in a classroom after school.This manga contains tentacle play and is not for the weak of heart. You have been warned.

A comedic oneshot featuring a bunch of girls with machine guns.

From Del Rey:

Out of the blue, a beautiful girl asks Kakeru to run away with her. This could be any boy’s dream come true, but there’s something strange afoot. It turns out that the girl is on the run from a shadowy government organization intent on using her psychic abilities for its own nefarious ends. But why does she need Kakeru’s help? Could it be that he has secret powers, too?

From Rayns&Lele Scans:

Demons will grant any human one wish in exchange for their soul. Anzamnia, an ambitious demon, has fallen to the bottom of the chart, having collected zero souls. After being kicked out to earth by the police, he found himself in Japan, in search of a human contractor in order to get back home. Then he crosses his way with a lonely little girl, who is convinced he is an angel sent from Heaven and insists that he grant her wish and form a contract with her, knowing it will take away her life? Anzamunia's first contract is formed, and her wish is... for them to get married?! So starts the blissful married life of this adorable and idiotic couple.
A marriage of different races, ages and personalities will now commence!

Ikebukuro, Tokyo—a neighborhood where twisted love prowls!! A series of street slashings in Ikebukuro begins to connect total strangers: A teenage girl with no personality of her own; a beat writer for a third-rate tabloid; a teacher suspected of harassment; an informant based in Shinjuku…and a headless rider straddling a pitch-black motorcycle!! Meanwhile, the slasher continues to terrorize the night, all in search of…“him”!?