From Yen Press:
Wending his way home after a bender one evening, master moocher and game programmer Keita Ibuki decides to satisfy a craving for ramen at a noodle stand. Instead of slurping soup, though, he surrenders his meal to a manic girl who, unbeknownst to Keita, is a Mototsumitama, a guardian of the coexistence equilibrium. When his new acquaintance is attacked, Keita gets caught in the crossfire and loses an arm. Awakening from the shock of his injury, Keita finds himself back in his apartment... arm intact! But just whose arm is it?! Asking the strange girl raiding his refrigerator reveals only that Keita's life has become a great deal more complicated.

From MangaHelpers:

Shun knew what to expect when he became a high-school student. As he entered the gates of his new school, four beautiful girls suddenly surround him. These four girls are the same four girls he grew up with since kindergarten. The four girls are Rio the athlete, Miku the cook, Nana the nerd, and Yuri the student president. These four girls will be battling it out between them in order to win the heart of their beloved Shun.

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.

The story follows Hakone, a hot spring spirit who descended to a spa resort on Earth. However, with her long slumber, she looks like a little girl on the outside. ("Yōsei" in the title is a wordplay on the Japanese words for fairy and a young child.) The high school boy Tōya stumbles across her at a hot spring and ends up joining Hakone in retrieving her original powers.

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.

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.

A school is transported into a fantasy world that is at war with dragons, and everyone in the school is given a powerful dragon slaying sword, and told the only way to get home is to help win the war. But there is a catch, to use the swords power you must be...a virgin!

Chizuru Yoshida is not your typical high schooler and she's all too aware of it! She has a talent with getting what she wants from her male lovers and often comes across as cold and manipulative... In truth, despite her experiences with guys, she has never been in love. That's until the fateful arrival of newly-trasferred student, Azumi Yamada, at her school. It was love at first sight for Chizuru--indeed an unexpected turn of events for the story's vixen! Not only was she in love, but with all things...another girl. Chizuru goes through a brief stage of anger and denial and tries to convince herself that she couldn't possibly be attracted to such a simple-looking, shy, and naive girl! To her despair she finds herself constantly thinking of Azumi, so she finally resolves to become friends with her, but it's not too long when she starts to push things along with Azumi... Despite the title, Hen is NOT Hentai. But it does have sex, strong language, yuri, and other elements that might make you think "Hentai".

Kurata Yuki is staying alone at home while his parents are off on their vacation. His childhood friends Nekoyanagi Mei and Inui Sayo are helping him with the household stuff in the mean time. Mei is outspoken and active while Sayo is calm and knowledgeable. They have known each other for their entire life and they treat each other like they were real siblings. Little do any of them know, they’ll be involved in a love triangle a year from now.

Fujiyama-san is 181 cm (Approx. 5' 11'') and she is the ace player for her school's volleyball team. Kanba-kun is 160 cm (Approx. 5' 3") and has known Fujiyama since their preschool years. With his prankster friends, Kanba peaks into the girl's locker room right when Fujiyama is undressing. From then on, he could not get the image of Fujiyama out of his mind, so he decides to ask her out. She says yes. Enjoy their naive and secretive relationship as Kanba ogles his tall girlfriend in many different situations.

A full color gourmet comedy that features a cute new character every week!

This is the story of a girl who transfers to a new school and quickly becomes popular, and also becomes the focus of another student who focuses on the occult, and for good reason…

A sequel to the OVA from the 1980's featuring a private detective investigating and exterminating demons inside dreams. Armed with mahou shoujo powers and bikini armor transformation, Rem is back and investigating a multiple missing persons case.

In her investigation, Rem meets another dream hunter! Who is she and could she also be a dream guardian like Rem?

Nakazawa Miyu is the 5th grade daughter of a bookstore owner. Unfortunately, it's an adult bookstore! Despite her desire for normalcy, she reluctantly helps out the store, much to her regret.

It's a different world where puberty is the result of a butterfly-like metamorphosis rather than simple growing up. Sometimes it goes wrong...

After experiencing tragedy firsthand, Amagi Souji does not feel that he is deserving of love or of loving anyone. It is not until a strange girl appears before him wanting to learn just what love is that he finds himself caught up in a battle between female warriors known as "Ark Processors." Will he learn to feel love again and will he be able to teach her what true love is?! Only time can tell!

Two prisoners managed to escape after the police truck carrying them crashed on the highway. One of them , Mr Sawazaki is a gangster who has sent 10 different bosses to hospital. The other called "You" - our protagonist - is a con artist whose cheating profile has piled up to approximately 100 billion yen. Accidentally, "You" then becomes the new teacher for the nearby high school, under the new name Takeda Shindo, and according to a deal of "Hammer Session" with the headmaster.

Long ago a magical cat disguised as a human woman fell in love with a human man. It is said that during their time together they even had children. They say that afterwards, the magical cat dwelt happily as a human, that she ascended to the heavens and became a cat-god, and is even now watching over the world of cats and men.

Of those descendants, the cats of Cat Forest Town say that they have mysterious powers. The townsfolk care for the cats as their guardian dieties, and the cats, too, have become attached to the humans.