A collection of short stories:

1 Junjou Erotica (Pure Erotica)
Heartbroken by her first love, senior high year 2 student Rika develops a fear of romance. One day, she finds out her first love's weak point! From then on, she starts her revenge...

Extra: Passionate Erotica (unscanlated)

2 Renai Teppen Shugi (Romance Summit Principle)
The two most popular people in school, Rinko and Shirou, are pretending to be a couple to keep people from confessing to them. Rinko is slowly falling in love with Shirou, so what happens when someone finds out about their fake relationship?

3 Romeo na Kanojo (My Girlfriend Is Romeo)
Seiya was the prince of his school until a new girl, Ryou, transferred in. "If I can't win against her, my only other option is to make her fall for me!"

4 Ouji to Kiss to Nemurihime (Prince & Kiss & Sleeping Beauty)
Shiya has a phobia with boys. What can she do, but ask the almighty ?prince? of the school for help? The prince is shocked that this girl doesn?t like him, and decides to make her fall in love with him! But Shiya has a weird curse: every time a boy touches her, she faints!

From Evil Flowers:

Kurosu Riri is very bored with her school life. In an attempt to do something new she tries to form a band with Ayata and Jin. But something is still missing, a former member, Ruki Sugisaki is needed in order to have the complete band. The only problem is that he's in a fight with Ayata. Will Riri be able to make things work for her band and make Ruki join? Better yet, to have it formed before it falls apart...

From Adachi's Universe:

Slow Step follow the adventures of school girl Minatsu as she looks for a man and tries to stay on top at school. She's got the school bully to worry about, two potential suitors, a pervert for a PE teacher, and a gang of criminals in hot pursuit.

A ladies man and a recently un-spellbounded prince have one goal: to kiss the sleeping princess! However, both men get more (or less) than they bargain for...

Follow this slightly twisted, yet amusing version of Sleeping Beauty.

Manga adaptation of the (in)famous dating bird game.

From An Endless Story:
7 years ago she received a goldfish at a summer festival. The goldfish is named after her beloved Jin. But Jin, her childhood friend, will be leaving home. At the time, those words were uttered unexpectedly...

From Simple Scans:
Volume consists of five separate story lines + sidestory:
愛し金魚
real intention
星のロマン
LIFE IS WHITE...?
YOUR VOICE
巻末描きおろしショ－ト (sidestory)

Nakano Fudanshi Gakuen is a school renowned for its sports program, yet only has an average school rating of 50! Within the school, there is a club on the verge of losing its official status called "Fudanjuku". The club's theme is, to put it simply, "anything-goes". This story is a slapstick school comedy revolving around the unique seven members and their various troubles.

Orurerian Kingdom’s first prince, Rudeiris, selected a female Knight name Aira to serve beside him. She proceeded to head towards the palace for a highly regarded mission and what awaited Aira was the Prince’s unexpected First Kiss!? At first, Aira was irritated with the Prince’s assertive attitude. But before long, she found a sadness hidden deep within the Prince and was emotionally moved by his heart…!?

The tale of a boy who falls in love "at no sight." It seems that everyone has met her BUT him.

After a crazy night with an unknown beauty, a young teacher is tricked into becoming the father of two gorgeous young girls. Will they be able to accept him as their father when his male imagination is running wild?

High School Student Kiriyama Kyotarou's parents own a beauty shop that he helps in everyday after school. Due to the fact he has to go home to work everyday after school, he never has the chance to get a girlfriend or join any clubs. But that may change since the delinquent female gang-head of his school asked him to teach her how to be an idol.

Fujima Taisei is a high schooler who had grown up spoiled by the people around him ever since he was little because of his pretty face. In his pleasant school life, there was only one time that had become the only stain in his life, when a student named Okachimachi, whom Taisei had grown close to in order to get others' attention, had told him that actually he had never been his friend at all. Now Taisei wants revenge. What will happen these two?!

From the manga Lovely Complex here we watch Koizumi Takuto (Koizumi Risa's younger brother) first year of high school as he takes on the adventures of his life. What will happen here..?

Kanau Yukimura is nine years old and she's meeting her father for the first time. However, he turns out to be an otaku! The two of them start living together in the same apartment, next to a lot of interesting neighbors. Unsurprisingly, things don't always go smoothly for these two...

Because of their parent's remarriage, high school student Satou Yuka, suddenly finds herself living together with her stepbrother, 23-year-old high school teacher Satou Taichi. Actually, their parents have not registered their marrriage and therefore they aren't even siblings by law; but since both parents aren't around, they end up living together! Taichi who has a very serious case of sister complex, wishes for Yuka to call him "onii-chan". But Yuka's reaction is very cold?

* Contains the short stories titled Private Princess, Chocolate Impact, Hot Chocolate, and Face of Fake as extras in each volume scanlated thus far. (Private Princess=vol.1, etc.)

Kid x Box has yet to be translated.

After the game to become god. Yukiteru winning there were a lot of question the epilogue left. This story focuses on the 3rd world Yuno, and as well reveal the current relationship of all the "Mirai Nikki" users.

From September Scanlations:

Oda and Hasegawa are childhood friends bound by a very special secret: Oda’s a third-generation pig farmer on a farm that raises FLYING PIGS. But when a nosy reporter starts investigating tales of upward-mobile porkers in the area, the two must band together (and thereby grow closer in doing so) to protect Oda’s family’s livelihood as well as the good-luck-giving swine.

From Kiwimyweewee:

A college student named Mitsuko works at his uncle’s hostel. On his way from an errand, he finds an unconscious yokai, Tenshi. When Tenshi wakes up he acts ferocious and arrogant. To express his gratitude to Mitsuko for saving his life, he also becomes a guest at the hostel on his own accord until Mitsuko decides what he wants. After being acquainted with Tenshi, gradually he opens his heart to Mitsuko. Suddenly Tenshi’s body transforms into an adult-like appearance and harasses Mitsuko!

In the gritty backstreets of Paris, Jin ekes out a living as an informant while his buddy, Mari, does business as a hitman. They've been friends since they were brats, but Jin's demanding behavior has Mari growing increasingly resentful. Even so, Mari can't seem to cut his ties to Jin.
Has their friendship lasted so long it's become impossible to break? What will happen when Jin's new live-in boyfriend ignores Mari's warning about Jin's carefree lifestyle…?
(ch.4 about guys from Non Tea Room)

From JShoujo Scans: Hana is a 16-year-old girl who's a bit of a tomboy. She gets dumped by her boyfriend when she moves to Sapporo after her parent's divorce. On her first night there, she comes across a young guy who is seemingly too ill to walk. He ends up collapsing on her and is quickly rushed to the hospital. As it turns out, he's her next door neighbor, Shindou Hiroto. The next day, when she goes to her new school for the first time, she finds out that he's actually a teacher and that he's the teacher of her class! With his out-going personality and friendly demeanor, he gets along with everyone, but she notices there's something a little different going on between him and Nishiwaki, a classmate of hers whom the others write off as a "cold-hearted beauty." Hana always runs into him on her way to school, and as she gets to know him more, she finds herself falling for him! Things get even more messy when her boyfriend who broke up with her comes to Sapporo saying that he wants to give their relationship another shot!