From AOC Translations!:
New Tooyama manga to be serialized in December 2015. This love is a new sensation! 1000% heart-pounding. A love for a person she can't say 'I love you' to is about to start. Mayo is a very shy girl. She meets Aoba-kun in her weird part-time job, and they begin to spend their secret time alone, but... The boy she meets is the one she is closest to, but is also the one she can't love. A far too clumsy, secret, unrequited love.

The mysterious game “Heart of the Girl.” A game where in the real world, girls are rated by their ‘rarity’. Will Nozomi be able to clear her former best friend, Kakoi? Find out in this heart-racing story of love and skirt-chasing!

Miyamoto Haruaki has the ability to see ghosts and is a part-time teacher who recently moved into an apartment. The ghost that haunts his room is a high school girl who is only interested in sex...

Though no one in school aware of it, Ootaki-kun, a first year high school student, is a big fan of 80's songs and idols. One day, he found out that his classmate that sits next to him, Yakushimaru-chan, has the same interests as him...

Sheltered sixteen years old Arisugawa Suzu enjoys, among other things, shougi, rakugo and spending time with his grandfather. While her all-girls school friends dream of having a boyfriend, Suzu’s idea of a pure and proper relationship can wait until her eighteen birthday. A handsome guy and some train encounters later set the beginning of a light-hearted comedy.

The middle schoolers Utahara Koharu and Hanaeda Yousuke are childhood friends, nothing more or less. At least according to Koharu, since Yousuke is dead set on making her his wife in the future and doesn’t refrain from telling her how much he loves her at every possible occasion. With Koharu being torn between annoyance and embarassment, this manga depicts their daily life and interactions with their families, classmates and friends.

Two childhood friends, a boy and a girl, used to share a secret magic. Now that they're in high school though... A story of secret love from an outstanding writer.

The story is about a second-year high-school student named Junpei Kousaka, who not only hates cats but also is allergic to them. Unforunately, he happens to have a crush on a girl, Kaede Mizuno, who really loves cats. On the way home from school one day, Junpei kicks an empty can and happens to accidentally hit the Guardian Deity of Cats. Now he's able to understand cats but was practically given a curse. He has to grant 100 wishes from any cat or he'll turn into a cat himself.

The school’s famous troublemaker—— Gu Ze! Originally only on 30-day class duty, student union vice president Ye Ruchuan ‘changed it a little’, making it 300 days... Two people fighting a battle of wits for whether to be on class duty or not! As the shocked bad guys go their separate ways, Gu Ze and Ye Ruchuan gradually start to get to know each other in the middle of a hateful godlike manipulation, and slowly cultivate an understanding of each other..... delinquent vs. vice president! The daily life of a 17-year-old trying his best to skip class duty!

From Aerandria Scans:

In the morning of his first day of work, novice teacher Tada Haruyuki got into trouble with the principal... and he got fired immediately! On the day that he was finally appointed to another position, he encounters a little boy with round eyes on a snowy mountain road. The little boy shows him the way to his new school, but no matter how he looks at it, the school seems weird?! What exactly is waiting for Haru here?!

One day, Kouki Nakagawa was determined to declare his love to Ayumi Fujisaki, his childhood friend. Suddenly, a mysterious girl appears before them and mentions that she is Kouki's girlfriend, leaving both perplexed. After trying to talk to Ayumi again, Kouki confesses his love to her; But Jindou, the mysterious girl, appears to warn Kouki that if he does not accept to be her boyfriend and does not forget Ayumi... the world will be destroyed!

From Lezhin:
Everyone considers me the purest girl to ever walk this planet. I'm viewed as the girliest of girls and no one dare thinks I would think about anything naughty. But that isn't always a good thing. I have my desires and I want to let it out!

Merry Christmas: Former reclusive boy Fuyugo Nakahara in class 2-E made his high school debut as a quiet and cool lone wolf in order to dispel the trauma of his past. And with him, the serious yet charismatic Sakura Igarashi from class 2-F. In the spring of their second year of high school, these two seemingly distant individuals come together and what follows next is…?

1-6. Washio Sumi wa Yuusha de Aru Gaiden: Yuusha Koushinkyoku
7-9. Kaettekita Washio Sumi wa Yuusha Radio
10-11. Yuusha GP

Saiga-san likes to talk about random trivia to Sano-kun.

Author's Twitter: https://twitter.com/skmsy34

Sachiko Usurai just wants an easygoing school life, and make some friends. But her head is inhabited by a strange being she refers to as "Neko-sama." A representation of her karma, in the form of a cat. These creatures that resemble animals, have been carried by humans for generations and generations and are said to influence a person's fate.

From ANN:

The story of the comedy manga revolves around Yūji Yugami and Chihiro Watanuki, who sit next to each other in class. Unfortunately for the transfer student Chihiro, Yūji is weird... extremely weird. Even though he's the ace of the baseball club, he hasn't adapted to the club at all. He also stands apart from the rest of the class, but seems completely satisfied with being alone.

The manga focuses on a certain unnamed character who appears throughout the story of A Certain Scientific Railgun and A Certain Magical Index, and whose name is revealed in this story set at Tokiwadai Middle School.

A series of oneshots.

1. Traces
After his roommate left, Katsumi feels a presence in the room that tries to violate him.

2-3. Midori no Himitsu & The Day After
Mizuki and Fumiaki are cousins that haven't seen each other for nine years. Now that Fumiaki transfered to Mizuki's school and stays at his home they should get closer but Fumiaki doesn't talk about his home and distants himself from his classmates. Moreover, the plants around Fumiaki act strange.

4. Traces 2
Continuation of relationship from chapter one (timeline after second story).

Spin-off manga of Yuru Yuri following the four teachers of Nanamori Middle School – Shihoko Azuma, Nana Nishigaki, Tsubasa Minamino and Hatsumi Kitamiya – in their high school days.