From Osuwari Team:

Beginning of college; checking out the school clubs... Nagi likes the drama club because it has a cool-looking guy whom Nagi thinks is kind. But once she joins the club he makes the club members do embarrassing things in public--and makes Nagi cry. His name is Rin, known as "Sad Yama." He won't let Nagi quit the club--and he won't let go of her either!
*Includes a side story called Danchi Rangers in volume 2.

From Intercross:
The weak-willed college freshman Okouchi Nagi and the super sadist Sadayama Rin... Watch as these two enjoy their fun and interesting college life in the drama club!

Rules/Hydra original dj. Involves Ryuu & Sakai ; follows where Kiss left off.

Miharu, a recently enrolled student at the Seven Saints Girls Academy, is kissed on the cheek in greeting by her friend Sara. Little did she know that Sara's cousin Itsuki saw the kiss and develops plans for poor little Miharu...

1) Imaginary Lovers
A man reunites with his college love after three years only to find out that his thoroughly male love interest has apparently conceived, given birth to and raised a son in the three years since they parted. That this is anatomically possible doesn't even occur to our slightly dopey seme, who's just overjoyed at the prospect of getting back "the one that got away" plus a rather adorable half-sized extra.

2) Brothers
Two very different boys learn to co-exist when they suddenly find themselves living together and expected to act like brothers.

3) Supreme Logic Study
Two college students bask in domestic bliss after ten years of friendship, totally unaware of their true feelings for each other.

4) Twin
When Wataru dies in a traffic accident, he thinks he has no lingering attachments to the living world... if that's so, then why can't he pass on to his next incarnation? And what's keeping the sad-eyed boy who shares his lonely rooftop?

5) Bet
A bet turns into something much more infuriating...

6) D.H
A boy is enlisted to write love letters for his less-than-literate best friend... unfortunately, the object of his friend's affection is his own secret crush.

A promising young doctor, Kirihito Osanai visits a remote Japanese mountain village to investigate the source of the latest medical mystery. While he ends up traveling the world to discover what it takes to be cured of such a disease, a conspiracy back home attempts to explain away his absence. Hinging upon his fate are those of his loved ones: an unstable childhood friend and colleague trapped between factions of the medical establishment that nurtured him; a fiancee emotionally transformed by Kirihito’s mysterious disappearance; and a stranger who becomes his guardian angel, a sensual circus-act performer with volatile psychological secrets.

Koga is enchanted by Aki, a mysterious and handsome coworker who is always helping her out at her part time job. But what she doesn't know is, Aki has a secret... He can't drink anything but tears?!

Matthias, a child abused continuously by his mother, having committed her murder finds refuge in a church where he meets a seemingly helpful, young priest and Hans, a fellow resident. Not much time passes, however, until Matthias realizes that there's something suspicious going on behind the facade of a peaceful shelter... [summary taken from Aarinfantasy's website]

Meet Min Woo. A normal 18 year-old high school boy. Well... normal except for being a total otaku. He does what every good little otaku boy does. He collects figurines and toys, wins prizes at cosplay contests and is a two-time champion of the fighting game "Metal Heart". Unfortunately for him, his social life is dominated by girls telling him to get lost, since his otaku-ness might be contagious.
But after an accident while he is invited to participate in the playtesting of "Metal Heart 2", the main character to the game, Min Sia, materializes in front of his eyes at a cosplay festival. And now, Min Woo has to win Sia's heart in a real-life dating sim game with the fate of the world in the balance. Ok, so maybe not the world, but at least the fate of the company behind "Metal Heart 2" hanging in the balance.
And who is this girl, Nuri, who appears to be following Sia and claims to be Min Woo's childhood friend...?

From Fateful Encounters:

In order to protect the world from the virus “Torikago” that has infected humanity, having fulfilled the condition of living as a normal human being, the young girl, Kiri, conceals the “World’s Memory” within her body. The world loved by the Torikago. The world that continues to reject the Torikago. Over the course of time, while the world erodes the memories of the girl who does not possess a free heart, she proceeds to fall in love…

Mone's motives for joining the art club might not be pure but her heart is.

From Deux:

The Konoe and Kazuki families have been fighting like cats and dogs for generations. Masaya Konoe and Yuma Kazuki attend the same elite high school and are known to all as arch rivals, but do they really hate each other? Masaya still cherishes a childhood memory of a time when Yuma shared a "treasure" with him. Now they share a secret attraction. Can they hide their passion? Burning desire has a way of erupting into flames!

The Deux published version of this manga does not include the short story called, "Water Lily". It's about two brothers where the younger brother is in a coma and the other takes care of him. The older brother molests his sleeping brother not realizing that his touches are being noticed.

From DGT: When Asano Arisu was little she was badly bullied by the local boys, now a high school student she's famous for her vehement hatred of men and boards an all girls school. When stunning Fujimi Kira enters and becomes her dorm-mate, proclaiming that she also hates men, Arisu thinks that it must be a fated meeting. However, they both have secrets that they need to keep from the Dorm Head, strict Kamitani-Sensei: Arisu keeping a pet ferret in the dorm, and Kira the fact that she's actually a BOY--much to Arisu's horror. It appears that he's at the school to uncover the mystery of his older half-sister's supposed suicide 2 years before. Will Arisu be able to cope with having to share a room with a boy, let alone help him with his investigations? And just how dangerous will it be to solve the mystery?

A collection of stories:

3. Shizu Bato (Scissor Battle / Scissors Heart)
Takahashi Yoh, who is bad with getting his hair cut, visits a salon and is charmed by the charismatic and gentle stylist Kuno Masaya. Will love blossom?

4. Meeting Tracks

5. Brilliant Tone

Kinren is a son of a famous prostitute, when his mother becomes sick, he sees no other way to survive than to become a sex toy of a rich Chinese noblemen, despite the protests from Bu Shou, who loves him. Years pass; Bu Shou has not forgotten about Kinren…

From Midnight Scans:

An overly touching love story of a miracle...

"One's "thought" is subject to change. A change in a human can change the world. Since we're not alone, we have to be brave."

Toda Erika’s shining star is rising... It’s a miracle of love.

Sakura is willing to do anything like wishing on a star because she wishes to grant her beloved Hirose's dream. This small deed is what attracts Sakura and Hirose to each other. For them, there's always a light in the darkness.

Mr. Mitsuya’s personal remake "Koi Goku Hoshi" has been turned into a movie. This is the original script from the movie "Kimi ni Hikari wo" which is compiled to be read.

And two other oneshots

Black Saga is a graphic novel (drawn in anime/style) that takes place in the United States (US) in the year 2037, once a peaceful and free country, now a communistic land, ruled by a terrible dictator ,bent on global domination. Within the Government, all formed as one, the states are soon merged and split up like live stalk in order to control all of the US's inhabitants like animals. Known as "Sectors" given a letter and a rank,the greatest,in which the governments all reside in...is Sector.Y.It is known for it's evil, and unholy biological weaponry and experimentation...soon to assure their goal of pure domination over humans, in the sad dream of achieving Goddom, "Project Delta Y", the project of creating humans known as "Assassins", purely artificial humans, who live in secrecy,as attack dogs, killing and terminating any threats to the one in control. Relotte Warden. Both forms of the "Assassins" are split into 2 phases,1 and 2. The Assassins...born with superhuman abilities...superhuman agility and strength.But some reside in tieriny ,only wanting a peaceful life within human society .But our protagonist, Ethan, is determined to break free ,along with finding out his identity. But he'll learn,it's not all he expects it to be.Black Saga is a horror sci-fi genre comic,filled with blood,horrific creatures,and heart-tugging drama. The Beginning Chapters are from 2012 and have a lower art quality.

Tetsuro Tanaka is a month late starting high school due to an accident. As he's finally able to go, he's almost hit by a truck, but is saved by a mysterious girl who wears the same pendant as the one that his school has. He finds out that he's the only boy in his class and is instantly hated by his classmates except for a few. One girl is Yayoi Asuka, whose name Tetsuro is familiar with as it's the same name as a girl he knew when he was little. A few more girls get introduced, one being Sakuya Kazamatsuri. Yayoi reveals that she has superpowers and she takes him to his dorm, which she is going to share with him along with Sakuya, Miyabi Tsukuyomi, Akio Suzuka, Otome Chouno, Hifumi Inokai, and finally his teacher, Kano.

From Shoujo Manga Maniac:

Minori's childhood friend, Shin, has always been a crybaby and even though he's considered the charming prince of the school, Shin is still a crybaby in disguise! Minori consider him no more than a little brother, but is Shin's crybaby character his real character?

A collection of stories:

1-3. Konna Hatsukoi
The super shy Kashiwagi Makoto from the student council has never been in love before. Although she thinks the popular new student Yanase Yutaka-kun is quite unapproachable, she comes in direct contact with him one day as a part of her student council duties?
- Dazzling Scans

4. Kirai Uta
Riko has always liked her friend Mori Yuuma, but whenever they're around each other they just argue and bicker. Will she be able to tell him how she feels before graduation?

5. Kimi Daruma.

6. Ano Okata no Tansho

7. Kimi wo Mamoru Hana

8. Omikuji no Usotsuki