This is a 4-koma comedy about a young girl named Ichimatsu Kohina who got possessed by a low grade spirit called Kokkuri-san.

From ShoujoMagic: Iizuka Sono just transferred to a new school where the reigning oddballs have their own club called "BxB Brothers" ("B" for "Baka" = "Idiot"). According to them, you make your life meaningful by doing things out of the ordinary. ;) While Kazuhisa and Kei aren't too selective about membership, Katsumi is -- so it's just the three of them... Until Sono strikes Katsumi as an admirably unusual person, and he coerces her into becoming a Brother! The more Sono learns about the Brothership and Katsumi, the more pride she takes in being a Brother, but being the only BxB Sister has its problems. Caught between the open affection of Kazuhisa and the reserved admiration of Katsumi (with Kei taking school-wide bets on the side), all while struggling to register the club officially, it's a BxB Triangle that constantly takes on new angles!

From Rain Over Paradise:

'Senpai, I want you to fall for me.'

When Hotaka, his junior at high school, suddenly confessed to him during their student days, Yuu felt so embarrassed that he gave him the brush-off. He was brusque with Hotaka, but even now, he regrets hurting his cute junior he cared about more than anyone.

However, when they happen to meet each other again after several years, Hotaka has turned into a devilish man who’s bent on seducing a drunk Yuu….

Young Gabriel Woods is about to discover that his dreams for an adventurous life will lead to something unimaginable. The door to the realm of the oldest race in the universe, GODS, is finally open to humans. From the mysterious dream eaters of hell to the legendary ocean realm of the sirens, the vast mysterious universe lay before him to explore, but Gabe must first prepare. Welcome all to the GRAND ACADEMY of OURANIA for GODS, where you will learn how to truly become a GOD. Is Gabe ready to face the powerful GODS of the new age, or will he regret wishing for more?

Izumino is a novice salaryman whose dream has always been to have an "office romance". He has been flirting non-stop with women since the day he entered the company but to his surprise, this company has a "relationships between co-workers are forbidden" rule. Izumino plans on paying no attention to this rule, but the company manager, Andou, won't leave him alone until he trains him to be an efficient employee. Izumino dislikes his manager who never takes his eyes off him, but seeing how efficient he is when it comes to his job, Izumino starts to feel attracted to him... What will happen with this double forbidden romance?!

A manga anthology based on the DMM Games/Nitroplus browser game Touken Ranbu -ONLINE-.

From MangaHelpers:
In this story set in the early 1920s, Tamahiko is the son of a wealthy family, but his life is changed forever when an accident cripples his right arm. No longer considered by his father as an heir, he is shuffled off into the country, to live out of sight. The teenage Tamahiko shuts himself in his new home, bitterly thinking of it as the place where he will die. One day, he learns that his father has 'bought' him a bride to take care of him, when the young teen girl named Yuzuki arrives at his door. She comes into his life like an innocent ray of sunshine, and Tamahiko's view of the world and his life starts changing bit-by-bit.

Masago is an average student. Everything about her is average except for her older brother, Shirou. He's the president of the student council and everyone admires him. One day, while walking home with her brother, they get into an accident and her brother dies saving her. After Shirou's funeral, Masago goes to the house of her brother's best friend, claiming to be her older brother.

From Infinity Studios:

When you're the most notorious delinquent at school you have one hell of an image to maintain. The last thing you need is to be seen taking orders from an innocent puppy-eyed girl. But unfortunately for Keiji Sendai, he finds himself in this exact predicament when, Setsuna Yatsusaki, the shyest girl in school (as well as being the biggest klutz) finds out about Keiji's deepest and darkest secret... that he's a hardcore otaku! With her new trump card, Setsuna blackmails Keiji into becoming her slave. But just how long can a weak naive young girl keep such a dangerous young man as her pet dog? Join in on Setsuna's secret as she sets out to "train" a notorious thug in this unorthodox love story.

Note: Was originally serialized in Dengeki Teioh magazine in 2005 as "Kyouhaku Dog’s". This run ended after the magazine became defunct in 2006.
Serialization restarted in 2010 issue of Dengeki G's Festival! Comic under the title "Kyouhaku Dog’s - Another Secret".

Nakahara Yukiko stumbles upon a class filled with supernatural students... Just what are these weird misfits doing in a human high school? NOTE: READ FROM RIGHT TO LEFT. ALSO MASSIVE ART-CHANGE AFTER THE FIFTH CHAPTER. 

From Chibi Manga:

After she took some medicines, Michiryuu became suddenly a little girl. People used to say that she was perfect. That's why she wants to go back to normal as quick as possible. But that will only happen if she can find a person she can fall in love with. That's completely impossible for her! So what can Michiryuu do?

In the Taro-kun wa Kou Miete Igai to xxx Desu. series:

V.1 - Taro-kun wa Kou Miete Igai to xxx Desu.
Living in the same apartment complex, Taro-kun who always looks so scary actually is…?

V.2 - Yappari Taro-kun wa Kou Miete Igai to xxx Desu.

Blood, war, and betrayal: this is the story of the Scarlet Macaw, leader of an organization devoted to crushing political threats on the Mervellian continent, a part of the Crimson World.However, the Crimson World is becoming darker than ever...http://tapastic.com/episode/81638

A collection of stories:

1-2) The Land of Dreams in My Darling
Shiro is lovingly taking care of his long-time crush Shohei, an aspiring ero-writer. Shohei has not changed at all since high school, when he was regarded as "The most disgusting man of the year", but for mysterious reasons his image in girl's eyes changed totally after he had entered university. Shiro's word crumbles when he catches Shohei using sex service.

3-5.5) Reaching the Deepest Place
A disillusioned P.E. Teacher, when patrolling streets, meets an intriguing younger guy. The problem is sensei gets easily drunk and ...

6) Hands in the dark held such warmth
A Yakuza and a Host.

From MangaHelpers:
Souichi is an art student, and one day he saw an amazing painting at his university that made him want to study under the artist. When he went to learn from the master, though, the man did not accept him. Shortly afterward, he met the man's granddaughter, a blonde-haired, blue-eyed child called Rune. She was a very energetic kid who drew Souichi into playing with her in the surrounding countryside. Soon, Souichi learned the truth--the painting he had been so impressed with at his university was not the grandfather's work, but Rune's. She is the artist from whom he needs to learn.

The sky has constellations, and humans have teeth. The earth has hills, and humans have little things.

A fun guide that teaches the basics of the art of manga by one of the most well-known mangakas in the business! Follow Eri on her journey to "become a pro and inspire people with dreams!"

He seduces girls, gets them and then dumps them. He specializes in the one-night-stand. He has no interest in love or romance. Dating someone would be a pain. This terrible guy, Hanada Shintarou, is nevertheless, extremely popular. But then he meets a girl who might just be the one who can change him and his low opinion of women. The only problem is that she despises him!