Taken from Serenus-Dreamers:

Admitting herself as super unlucky person, Ritsu, freshman in high school, tries to get out of unluckiness and disasters by living in the school dorms and starting fresh. However, with her destined meeting with school's famous genius as well as problematic student Eiri, Ritsu starts to get unluckier everyday....!?

Yatsufusa Yoh's father reappears after a year and suddenly enrolls him into a school out of the blue. Offered the chance to meet with an old friend, he sets out only to run across two Nemesis Power Users and the battle against Karma begins...

A narrative of self-discovery masquerading as a coming of age romance, a family composition drama, a procedural detective story, and a superpowered thriller. Sakuta Minami openly professes the many loves of her life: Matsumoto Leiji anime, her family, swimming, Magical Plastering Girl Buffalo Koteko, but the unanswered questions surrounding her mother’s separation from her natural father have nagged her all her life. Moji Shouhei, an anime geek with prodigious talent for calligraphy, holds in his gifted hands both a physical key to the school roof of their high school as well as the figurative key to finally unraveling the mystery of Minami’s father.

A young girl named Hinomori Asami starts her studies at the Sakura Hill School for Girls in Tokyo, but the capital is a dangerous place, and mysteries abound.

A collection of extra chapters released seperately from the other volumes.

Su Jia Ao is a normal high school girl, and she's in an unbelievable situation she's never encountered before. A fiancee descended from the sky; his attractiveness can't be stopped, together with that thing; this fiancee is exquisite, kind, gentle, and a highly moral person. Her parents and her neighbours compliment him nonstop. But... What a joke! Who would want to marry someone, who doesn't have man's qualities, as her husband? I'm afraid, even if I come to the Dong Nu Clan, who uses women are superior to men as an ethic, it won't work. For sure, I'll break the chain of these old principles and sing a song of freedom! ...

Tsukasa Shiratori, Nadeshiko Washio and Mikage Kotooka are three close-knit friends in junior high school. For almost a year, Tsukasa has been harboring a secret she can't tell anyone: she has a crush on Nadeshiko. She resigns to keep it locked away forever, but then discovers that Nadeshiko has a crush on Mikage. Not wanting to mess up their current relationship, Tsukasa decides to support Nadeshiko in any way she can. However, Mikage has a secret of her own that she can't share with anyone.

A new manga series based on the popular anime “Shounen Ashibe Go! Go! Goma-chan. Follow the cute and unusual daily life of energetic 1st grader, Ashibe and a baby harbor seal, Goma-chan!!!

From Deux:
He Sees Ghosts...And One Sexy Guy! High school student Fumiya possesses the ability to see things normal people can't: ghosts and spirits. Each time Fumiya sees one, he turns to the tall, handsome, and popular Shogo, the son of a temple priest, for help. After being rescued time after time by Shogo, Fumiya can't resist developing certain feelings toward his savior. Watch as ghosts and spirits work to drive these two together!

"I am Kikyou! I'm working part-time in this cute little flower shop called "Tsumikabatsu". My boss, Baramon-san, is extremely popular with girls and he's a master at flower arrangements! He's a well-respected person. But, WHY does he have to stand so close to me... Aah, Boss, wait! Stop that!" I'm trying to introduce the story here, DON'T TAKE OFF MY PANTS!!!........So, so it's like that, please read this "the beautiful boy working hard in the flower shop, "Tsumikabatsu"!

Fumio Tokuoka, a boy who just entered high school has decided to meet his sister Muko right after the Entrance ceremony. However, little did he know that his sister was actually the President of the Culture Enthusiast Club, also widely known in school as the Otaku club. Desperate to keep the club afloat, Muko is determined to round up some new recruits to prevent their club's demise and with the Achievement System taking place which condemns non-academic or underachieving clubs such as the Otaku club, will the club live to see another day?

From Yaoi Shake Scans:

The outstanding boys' high school student Miki Masami's not-so-outstanding part-time job is at the somewhat suspicious detective agency, "Tsukumo's Detective Office".

His superiors, Jinnai Hajime and Kiuchi Kan, are very cool, but considerably eccentric individuals. Though he finds the days of Jinnai calling him the "destined child" troubling, what concerns Miki more is Jinnai and Kiuchi's overly intimate relationship...!

The love triangle comedy of the puzzled detectives, followed by the compilation of "Koibito Kankei" (A Lovers Relationship) concerning Kiuchi and a brute glasses-wearing boy.

A guy is pulled into an neo-classical world through his dreams, however he has become an eroge's heroine.

From SP:
Suou, a warrior, is indebted to a demon called Sakaki, who saved his life.

N/A

Magamo Yoshihiro accidentally walks in Anna's room as she was in her leather outfit masturbating in broad daylight. This chance encounter will define an ever changing relationship between them especially as they go to the same school!

A love comedy about a female university student who is secretly working as an underground idol and what happens when a super sadistic guy finds out that secret.

In the not so distant future, Earth is invaded by aliens. The United Nations instates a draft, and all humans on Earth are eligible to become soldiers. Kurando Nieno is a rather scrawny high school student, scoring the lowest scores possible on the preliminary draft physical. During an air raid from the aforementioned aliens, a rather irritable black haired girl crash lands in front of Nieno and attempts to drink his blood. The United Nations air force and Eliza the vampire have selected Nieno as Eliza's delicious new food source!