From MangaHelpers:

Katagiri Yuichi believes that friends are more important than money, but he also knows the hardships of not having enough funds. He works hard to save up in order to go on the high school trip, because he has promised his four best friends that they will all go together. However, after the class's money is all collected, it is stolen! Suspicion falls on two of Yuichi's friends, Sawaragi Shiho and Shibe Makoto.

Soon afterward, the five of them are kidnapped, and wake up in a strange room with a character from a short-lived anime. Apparently, one of them has entered them into a "friendship game" in order to take care of their massive debt. But who was it, and why did they have such a debt? Could they have stolen the money from class to pay for entry into the game? Katagiri and his best friends will have to succeed in psychological games that will test or destroy their faith in one another.

Chouko Manaka is the next heir to the prestigeous Manaka family. Now she is entering high school and she has had enough with being surrounded by bodyguards, who have prevented her from making any friends. Her father is still worried though, so he makes a deal with her. If she transfers to Mizuno-o high school, where many of the students are also studying to be shinobi, and can get one of these people to be her right-hand man before graduation, he'll consider her to be able to make decisions for herself.

On the first day of school Chouko meets the son of their butler, who suddenly declares that he wants her to be his master?!

Having no experience in romance, the vibrant Ninako curiously explores the meaning of what "love" really is, and is surprised to feel a colorful range of emotions as she grows closer to the school heartthrob, the quiet yet gentle Ren, who also happens to be involved in a longtime relationship. With every intention of keeping her head held high, Ninako prepares to face the mental pain of this one-sided love that she had allowed to take root, facing a series of trials that would either contribute to her growth as a headstrong woman, or break her as it did with other girls.

However, is this really a one-sided love? Or had something been silently sown in the most hidden part of Ren's heart?

Volume 2 contains the side story Another Light about how Ren and Mayuka first met.

Volume 5 contains the side story Unfinished Map about Ren and Andou's friendship in middle school.

Volume 6 contains the oneshot Colourless Dreamer, which is unrelated to the main storyline.

Volume 7 contains the side story Wishing for Yesterday about Yuu and Sayuri's past.

Volume 10 contains a side story about Manabu's love.

From ANN:

The story revolves around Tomoya Mizuhara, a 13-year-old boy who suddenly gains a big sister when his father remarries. 17-year-old Ichika is a little strange, and her affection for Tomoya is rather overwhelming, if not scary. On top of things, Ichika's friend Ruri is the ultimate sadist. Then there is Ichika's big-breasted quarter-Japanese friend Marina.

From Imangascans:

Kashiwada Naoki was determined to lead his high-school life without anyone knowing that he's an Otaku. However, his classmate Bishoujo, Koigasaki Momo, who was rumored among the girls to be a bitch, found him out!? Before the despairing Kashiwada, she said something undoubtedly surprising.

"Aren't you an Otaku? Then, make me into an Otaku!"

The love story of two individuals bounded by an agreement of Otaku and Riajuu starts!!

In the 21st century, aliens have arrived on Earth and live among humans. In sleepy Enohana, the dirt-poor student Chigasaki Mayuko finds herself living together with NieA, a low-caste ("Under Seven") alien. While Mayuko struggles diligently to make ends meet, NieA seems to be totally unconcerned with the consequences of her actions.

Note: An omnibus version was released under the name NieA_7 Recycle

Neko Majin is a parody of Dragonball Z by Akira Toriyama. The protagonist Neko Majin fights evil-doers and has a few other Dragonball Z-esque adventures.

Short stories :

• Neko Majin

• Neko Majin Z

• Neko Majin Mike

From BL-League :

Rei, a host, suddenly reunited with his childhood friend, Makoto, after seven years... Was their encounter only a coincidence or...? Fateful love between a tsundere host and a faithful doctor.

From Antisense Scanslations:

Mimori is the princess of the frog kingdom, a fantastical place populated by the human frog tribe and, well... frogs. One day a young boy named Aoi shows up on the borders of the kingdom, claiming that Mimori's elder brother Makaeru cast a spell on him that causes him to transform into a frog when splashed with water. Together, Mimori and Aoi set out on a journey to find a spell to cure him. (And things only get weirder from here on out.)

Matsumoto Hinako is a girl who's not good at expressing her feelings. After being dumped for that exact reason, she accidentally sees Uchida, a classmate, breaking up with his girlfriend. "What a noisy guy..." she thinks and then he saves her with a bicycle...

Life in hell is like peaceful, ordinary life in some ways. The kids live in a place like a dorm, and they go to school. However, every person that has fallen into hell has some kind of punishment. Eto Juri falls constantly into hopeless love, sometimes even with inanimate objects. Hida Mari is compelled to always eat carrots, which she hates. Ando Natsumi is ridiculously popular, so that even the textbook problems are about him. Soon a newcomer joins them, Nakamura Mikoto, who frequently mangles her words and becomes impossible to understand. The four of them live through their peaceful school life--in hell!

Volume 1 contains 1st part of Jigoku Koi Sutefu and also Obake Monogatari.

Note: Volume 2 is an original doujinshi by the circle Happa.

The main character is a delinquent feared in the whole region. He tried to start a new peaceful life full of love instead of blood but his past immediately catches up to him and reveals his true identity to everyone in the class. He meets a girl in trouble and decides to revert to his old self just to save her.... except she doesn't really need saving, beats him up and calls him weak!. He fell in love with this "flower that blooms in the battlefield" and decided to try to join the karate club (she's the captain) just to get close to her... but things aren't that easy....

Our heroine is girl named Hina-chan. She is in her 20s. Hina has a handsome boyfriend now, but she will always remember her first love, a boy named Itsuki. When other kids would tease Hina, calling her ugly, Itsuki would defend her, and try to cheer her up and make her feel better. He and some of his family eventually moved away, leaving Hina heartbroken. But the memory of her first love will always make Hina feel nostalgic and happy inside. Itsuki’s grandmother still lives next door to Hina, so she still has a connection to him, somehow.

One day, Hina has a dream of Itsuki, and she is feeling especially nostalgic about him. She is just mentioning her dream to his grandmother, when they are interrupted by the arrival of a stranger. It is a tall, beautiful woman. Wait a minute… it’s Itsuki! Itsuki is not joking, either. She explains that she is really a woman on the inside, and now she is dressing that way on the outside.

Hina finds herself falling in love with Itsuki, regardless of Itsuki's gender. But Itsuki is only attracted to men. Will Hina end up heartbroken all over again?

Hearing news of demons plaguing the Hakkyokuseiken dojo, Andy leaves his friends to investigate it. To his shock, the rumors are true and the demons' overlord is the formerly deceased Geese. Using his troop of seven demon lords, he imprisons the younger brother and hopes to make him one of minions. Worried about his brother's absence, Terry teams up with Joe, Mai, and Big Bear to battle the undead forces and rescue Andy.

Tagamori Shinta is a student who routinely confesses with complete sincerity to any girls that he likes, failing every time with good reason. One day, after another failed attempt, he stumbles upon a strange shrine and ends up making the most important wish of his entire life. A romantic comedy packed with action on a celestial scale.

A manga containing anthology chapters, illustrations, settings introductions and interviews about Fate/Prototype.

From Kodansha Comics:

In the Kingdom of Fiore, wizards are commonplace, but the powerful women of Fairy Tail are each one of a kind! And after fighting their way to the top of the Grand Magic Games, Lucy, Erza, Wendy, and Juvia deserve a vacation. The wizards slip out of the victory celebration to do some sightseeing as a foursome, but where Fairy Tail goes, trouble’s never far behind, and soon they find themselves caught up in yet another chaotic bought of spells lining…with the fate of Fiore in the balance!

New stories starring the magical ladies of Fairy Tail!

In the Dekichatta Danshi series:

Vol 1. Dekichatta Danshi
Childhood friend of the house next door, the tsundere Hisui and the serious Yuujirou are always fighting. Although they're always doing it?, Hisui says that they aren't a couple! Can a baby be raised by those two?! Actually, Hisui and Yuujirou came from a lonely home environment. Will parenting and love be compatible?
A popular series, with a lot of H!
~BA

Vol.2. Harem Hen

Vol 3. Honeymoon Hen

Vol 4. Hungry Hen

Vol 5. Haruhi Hen

Vol 6. Harahara Hen

Vol 7. Haruhi Hen 2
------
extra story: Dekichatta Danshi: 3P-hen (できちゃった男子～3P編～)

When he was young, Kurosu Keisuke was in a special TV program showcasing children with supernatural powers, called "Esper Shounen". Seven years after the termination of the program, a murderer appears to be targeting the Esper kids, whom he/she considers to be monsters. Will Keisuke and his old friends be able to discover the murderer and avoid becoming the next victims?!

N/A