From DokiDoki:

Marion is a young schoolboy who prides himself on his adherence to a philosophy he calls "realism". Because of his distain for emotional display, he ignores anything remotely akin to affection. But when Marion is entangled in a romantic affair with an older courtesan, his rationalism is revealed to be little more than a cover for his own emotional immaturity. Learning to love, Marion blossoms under his older lover's care but unfortunately, Marion has yet to learn the true price of the affair.

Hino-kun is good-looking and a rumored delinquent. Actually, he is a kind-hearted high school student who looks after his young nephew. He can see that Mizusawa-kun is good at making sweets so for the sake of his fatherless nephew, he asks him to, “Please marry my older sister!” But instead, he receives a reverse proposal from Mizusawa saying, “I want to marry you.”…?!

"Fun After School" is a two-part one-shot that tells about the relationship between Iwata Megumi, the idol of Chofu High School, and Midorikawa Mayuko, also known as Miss Chofu High School. When another student takes a picture of the two of them in an intimate moment, what lengths will Megumi go to to get the picture and negative?

"School Days" centers around a girl named Misaki who hates the co-ed school she was forced to transfer to and desperately misses her best friend from the girls' school she used to attend.

A collection of oneshots:

1) The Glasses Thief
A cute story about a boy with bad eyesight and the girl who is in love with him.

2) Convenience Store Honey
A boy worries about his quiet boyfriend.

3) Adult-Uniform
A girl wonders why her childhood friend does not speak to her anymore.

4) Refrigerator Chocolate
Satoru is going to have heart surgery with a 50/50 chance of surviving. One day he comes across a girl in a refrigerator...

From Aerandria Scans:

There are some things that I can’t understand since I’m a child. So, I’m going to try my best to find someone who can show me how to become an adult.

A funny collection of shorts about two girls named--you got it--Nanami and Misuzu.

Akiyama Youichi is a high-school boy who adores the cute Nana-chan from afar but he's clueless about girls and terrified of asking her out on a date. He discovers in a very peculiar manner that he has a love rival for Nana-chan's affections in the curvy and sexy shape of Natsuhara Yuri, a classmate and (platonic) best friend of Nana-chan. The battle for Nana-chan's affections is joined with Youichi trapped in Yuri's body and Yuri using Youichi's body to ask Nana-chan out on a date. May the best, umm, person win!

The time of the folk dance is approaching in Takumi's school, the folk dance is a famous couples event thus people that are single and unpopular such as himself have absolutely nothing to do with it, well; he is part of the committee that sets up the event, so while he lacks romance his relationship to the event "isn't zero".

.... Takumi, however keeps having this dream where a beautiful girl asks him to the folk dance, and being a "couples event" it's pretty obvious to him that someone asking him to ask is much deeper than a simple invitation for dancing..... But, a dream is a dream and even though Takumi keeps thinking to himself "this seems so real", the dream is still a dream; he can't even remember clearly the face of the girl that asked him out.

..... What Takumi obviously doesn't notice, is that his tomboyish childhood friend and pretty much every of the other (female) member of the committee also don't have a partner for the folk dance, furthermore Takumi is not as unpopular as he perceives himself to be.... Could that dream be a foreboding one?

From Evil Flowers:

Kobayashi Hina has always had one single goal: to study hard and get into a good university. During her breaks while studying at the library she notices a short soccer player in the courtyard and gazing at him is starting to become a habit for her. She doesn't know who he is, but his constant presence near the place she’s studying is starting to become a distraction. Does finding love mean giving up on studying?

The unconscious passionate pheromones of a substitute teacher?! The fierce approach between a strikingly hot student and a naive teacher?!

[From Shinkirou Scans]

Mizuki is a regular high school girl that loves sweets and pink things. One day, she is suddenly confessed to by Akiyoshi Kazuma, one of the most rumoured delinquents in school. At first, she gets scared and wants to break up with him already, but as she hangs out with him more, her feelings start to change.

N/A

A one-shot from the first volume of the anthology “Hirari: Extra Issue Girls’ Club Anthology After School!“

Popular playboy Kanzaki has his eye on Asahina, who practices basketball diligently. Only problem is... they're both guys! Or so he thinks...until an unexpected accident uncovers his crush's true identity as a girl. But why is Asahina cross-dressing in a co-ed school? Rivalry and romance begins in the basketball club!

Asakura Hime is a girl who loves magic and only good at it. One day at her part-time-job-place, she meet a very strange guy who can perfome a magic that amaze her. So she follow him to ask how he performed that magic. And she discover that he was called a panda-lover mad scientist.Now the start of her high school life with a panda-lover mad scientist begin!

From Intercross:
Asakura Kohime is a first year high school student who loves magic. She belongs to her school's magic club, and even performs magic in places like school or cafes. One day, she meets an oddball from the Chemistry Club, Kijimamoto Nari. He apparently hates magic! What will happen to the two?

From Fantagraphics:
A DECADE-SPANNING JOURNEY INTO DARKNESS
Even as butterflies ominously proliferate in town, the rumor of a mysterious creature lurking in the tunnel behind the school spreads among the children. When the body of Arié Kimura's mother is found by this tunnel's entrance, next to apparently human traces, the legend seems to be confirmed. Is the end of the world coming? In order to appease the wrath of the beast, the children decide to offer it a sacrifice: The unfortunate Arié, whom they believe to be the cause of the curse, is shoved into a well that leads to the Nijigahara tunnel — an act that in turns pushes Komatsuzaki, the budding thug who has carried a torch for Arié for a while already, entirely over the edge.
But this is only the beginning of the complex, challenging, obliquely told Nijigahara Holograph, which takes place in two separate timelines and involves the suicidal Suzuki; Higure, his stalkerish would-be girlfriend; and their teacher Miss Sakaki, whose heavily bandaged face remains a mystery; and many more — brothers, sisters, parents, co-workers, teachers, aggressors and victims who are all inextricably linked to one another and all will eventually — ten years later — have to live with what they've done or suffered through.

From Hidoi~! Translators:
Miu is an average high school girl who lives in a fantasy world dreaming about the day she'll find her destined one, just like in the manga stories she reads. What she doesn't know is that her prince might be closer than she thinks.
One day after getting punished by running around the school, she gets hit by a motorcycle at the school gate! When she sees it's a guy she thinks it's her so awaited prince. But later she'll find out a secret about this guy and his twin brother...

From Lililicious:

Cat's Eye Hall is a mysterious shop that exists to guide lost hearts. If your heart is lost, follow a black cat and you might just end up here...

In the Nekomedou Kokoro Tan series:

V.1 - Yuri Shinjuu (A Yuri Double Suicide)
- A Yuri Double Suicide
Shiho and Hiyori think they can only be together in death. But as they're looking for a place to commit suicide, Hiyori disappears and Shiho follows a cat to a mysterious shop called the Cat's Eye Hall.
- Beautiful, Cruel Pride
- Hana ga Chittemo
- Shitataka de Ite Bukiyou na
- Kaminagahime

V.2 - Shoujo Hakumei
- Shibaru Ito
- Stella Maris
- Satou Kashi wa Yume wo Miru
- Amai Moumoku

V.3 - Renai Higan