From the manga habit:

Shiina is a serious man who has wanted to be a zoology professor since he was a child. He was infamous for always carrying around many massive books. Now 28 years old, Shiina is an associate professor who works diligently to train future zoologists at a university while looking after his childfood friend, Chitose. Chitose is also an associate professor in the biology department and apparently always walks around with penguins. So he is quite infamous in his own right. Chitose has a weak constitution and always needs Shiina’s help. This manga focuses on the trials, tribulations, and future of the young associate professor, Shiina.

From DMG:

It started out as a way to prepare for a future lover. Too long denied a flesh and blood companion, his substitute—a teddy bear—is now his love object. What happens when a persistent, excessively cheerful neighbor consumes his serious, carefully ordered life? An explosion of hurtful, panicked words.

Stepping back into his quiet life, he can’t avoid what his insufferable neighbor left behind: cracks that expose his festering loneliness. Only one person can fill those cracks, but he’s disappeared.

WEEKEND OF DREAMS: With her brutally honest, trembling line art, isino aya creates a companion collection to Sink into You. Love and acceptance, joy and sorrow, desire and disgust: they move beyond simple shapes in black and white.

From Day of the River:
No matter how hard or painful it is, I’ve once again, fallen for you…

On the day of the junior high entrance ceremony, Hinagata Nazuna fell in love with a second year student, Ichikawa Nao. Unfortunately, her love was short-lived as she discovered that he already had a girlfriend, the basketball club manager. As time passes, Nazuna decides to let go of her unrequited love for him and aims to find a new love interest. However, on the first day of her high school entrance ceremony she unexpectedly comes face to face with the boy who broke her heart years ago….

The premise is simple. You follow the days of Sergeant Maritan, a Drill Instructor of um… the U.S. Marines? Well, yeah. Apparently, Maritan is actually a Princess from the Magical Kingdom of Paris Island, which has signed a treaty of co-operation and friendship with the Great United States of America. God bless America. Maritan usually goes around abusing training raw meat recruit Army-tan, under the supervision of Lieutanent Commander Navy-tan. There’s a GA-tan somewhere near the end too, a meganekko attached from the Self Defence Forces, it seems.

N/A

From MangaArt:
Ami is a normal school girl. One day with her friends, she got stopped for an interview by a camera crew who thought Ami was really cute.
Shortly afterwards, Ami meets a blond boy who goes to her school named Nozomu. He seems to show some interest in her too. However, after she went to the 'Darwin', a group of two boy singers, concert, she met another Nozomu.
Very soon after the encounter with Darwin, she then got roped into the entertainment world as there were many people already interested in her from her live interview, who she later also became interested in.

1) Every Sweet Night
Garyou's childhood friend Kou is a famous model who never has time for him anymore. So Garyou hooks up with random guys to try to ignore his feelings for Kou. But the latest one may be more than he can handle. Story of Kou is in chapter 2 of Mikansei na Karada.

2) The Return Road
After his parents had to go overseas for their careers, he had to move in with his uncle. Their relationship has always been contentious, so will things turn out well?

3) I Want To Drive You Crazy
Tsutsumi has an angel's face and a devil's mind. The high-schooler is always thinking up new ways to tease his pet - the school's doctor!

4) His Training Failure
Middle aged video store owner is enthralled by his younger lover Tetsu. But is Tetsu as serious about him?

5) Love at First Sight
The unpopular model is finding it hard to get gigs and has finally decided to take up a new case, to model for a SM painter because of the double rate the job provides.

6) Sweet Youth
The gay high school student is at the end of his wits; he can't come out, he doesn't know how to find a partner, much less experience love and sex.

7) Beautiful Life
His cute cousin has just lost his parents. Looking at his crying face, he can't help but want to comfort him.

8) The Reason to Torment
He can't quite put what he is feelings for his classmate into shape; does he hate him or is it more that just that? Why does he want to bully him so?

9) Tell Me!
Continuation of chapter 8. Their story continues in chapter 7 of Mikansei na Karada.

Ever since he was young, Miharu has suffered from phantom pains. When his divorced parents decide to reunite after 15 years of separation, he discovers the exact reason why: his younger brother, Natsu. Apparently, he and his brother are astrological twins. Miharu feels Natsu's pain, but... Natsu doesn't feel Miharu's? That's just not fair!

Don't be confused with Hwang Mi Ri's "Love Fantasy."
as both Titles have "Love Fantasy"

A wedding engagement from love between a girl and a guy since they were children (6 years-old and 4 years-old). About ten years later, will their love still be the same? Will they have a happy ending?

From Tokyopop: As punishment for being late to class, Kanata has to ring a bell in an old, deserted church near his high school. When the floor breaks, Kanata falls into a vast room, where he discovers a coffin--and inside, the body of a vampire. The vampire rises, killing Kanata. But Kanata's soul is saved, and when he later meets the vampire, they realize that they are bound to each other through a magic spell: If Kanata dies, the vampire dies, too!

In the Little Busters! Ecstasy (EX) series:

V.1 - Tokido Saya - School Revolution

V.2 - Sasasegawa Sasami - Black Cat Fantasia

V.3- Futaki Kanata - My Minroud

27 years old, civil servant (government employee) examinee, Nam KiHan! One morning, when he woke up, he traveled back in time of 16 years! A scenario where everyone dreamt of at least once, reliving your life. Watch as Nam KiHan attemps to relive to become an elite of the society! Webtoon in Naver Please address this work as a Manhwa (Korean word for cartoons)

Collection of three short stories:

• Lip Cream

• Nagareboshi Iri Chocolate Cake (Chocolate Cake Made with Shooting Stars)
Machida Yuuki asks her close friend Hiro to help her bake a chocolate cake for her crush, because even though Hiro is a guy he is an incredible pastry chef! But who is Hiro's Valentine's Day crush...?
- ShoujoMagic

• Pocket Bell

There's mystery in every corner of your school! And Maki will tell you all the story behind it...

Sihu Choi, a 2nd year high school student, is famous in his school for 2 things: reading the morning announcements and turning down confessions indifferently.

Aeun Son, also a 2nd year, loves nothing more than to listen to Sihu's soothing voice every morning, often arriving to class late in order to hear the morning announcements in a quiet corridor.
As the new school year begins and Aeun's obsession flares once more, she makes a promise to herself that she'll become Sihu's friend at the very least.

With the help of her older sister, and the fact that they've been put into the same class, can Aeun succeed where every other girl before her has failed?

original webcomic

Three people with completely different personalities except for their love for music come together to create an orchestra! http://comic.naver.com/webtoon/list.nhn?titleId=452116&weekday=wed

"You, want to join the track and field club?" Kourin-senpai's words decided the outlook of Fuuko's adolescence. Discovering the joy of running, with Takeo and Kiichi who joined the track and field club together with her, under vigorous training they sweat on the track everyday. Before long, her feelings towards Kourin-senpai's changes from admiration to love... Becoming a sparkling light and running through, an adolescent athletic story starts passionately!!

Kaoru declares that he will take off Takara’s legendary jacket, his shirt, pants and his underwear!

By Pink Rose Scans:
This is the tale, where the progress of senior high-school reorganization is accompanied by declining birth rate,
where survivors are on the line, in regards of the reformation of their precious school
challenged to increase the number of their students, This is the epic story picturing
The Student Council of Baddoun High fights of youth.