From Chibi Manga:

Wanted to be spoilt by boys. I entered a school full of boys!?

Oneshot from Shirokuro-kun to Anzu-chan.

The story is set in a middle school in Shishibone city. Tomohiro Miyajima, the main character of the story, and his group of friends are busy studying for an exam. One day, in search for a thrilling mystery as well as easy money, they take several donation boxes and fabricate a curse to scare everyone: “Ohone-sama’s curse”. After scrawling 骨 (bone) all over the chalkboards and spreading rumors of the curse, the donation boxes are quickly filled and the curse becomes a major legend of the school. Of course, only Tomohiro and his friends knew the curse was fake. It wasn’t possible for anything to happen.

That is, until they receive a donation of 50,000 yen and a letter to go with it, reading: “Please curse Tanashi Miyoko”

Immediately after that letter, bullying and crimes in the school escalated, strange incidents occur, and Tomohiro and his friends are left with a much bigger mystery than they wanted to have, that they are forced to investigate by themselves. What happened shouldn’t have happened. Those who are alive should not be alive, those who know what they know shouldn’t have been able to know, and familiar faces are hardly what they seem, but why? And how?

—Note: The world that this story is set in is the world shown at the end of Higurashi Kai, where Frederica Bernkastel meets Tanashi Miyoko and Miyoko’s parents do not die.

[From FCTranslations]: When Momoe visited her old school, she remembered an event occurred there when she was still a student. Twenty years ago, rumors said there's one man who came to the girls' dorm by night, search for his very own targets, and steal their soul. To find out the truth, Momoe, who teamed up with three other friends, is determined to find this intruder. One rainy night, she found a naked young man near the church, and it turned out he has a lot of connections with the one Momoe is searching for......

From bl-gyaru:

Niia is a good student who always has the top grade in his class. One day, his teacher finds out that he’s a smoker, so to receive a recommendation letter from the school, he’s willing to do anything for his teacher.

I thought we weren't living in the same world but then I had to play the perfect girlfriend for that popular boy?! No wait! Don't be that kind with me!!!

(Also included in the Sweets Fortune Telling Anthology as Boy of Chocolate story)

Narinomiya Aoi, the daughter of a distinguished family, has a secret. Thanks to her grandfather's debts, she's now the "pet" of Katsuragi Kei, a rebellious new student at their prestigious academy. How will she escape the burden of the debts and what exactly is Kei actually after?

After the president of the Astronomy club graduated from high school, Shiose Kanako was appointed as the president. However, no one really takes her seriously, and most of the other female members are only interested in Azumi Seiya, a handsome and popular guy who’s also a member of the Astronomy club. Trying to gain more knowledge about Astronomy so that she could get more people interested in the club, Kanako goes to the rooftop one night, and she’s surprised to find…

Kirishima, is a popular teenage boy and a star athlete at his school. For some unknown reason, he seems to have vanished off the face of the earth after quitting the volleyball team. His disappearance eventually became pivotal to the collection of stories about various individuals who are connected to him in some way, with each having a unique point of view about connections, relationships, social boundaries, and the similar events that revolve around them.

This story is based on the omnibus novel "Kirishima, Bukatsu Yamerutteyo" by Asai Ryou which was first published in February 2010.

Seito Shokun follows the life of Kitashiro Naoko, nicknamed Nakki, as she plows through life with her friends and family. Faced with hardships and struggle, happiness, sadness, love and tragedy... Nakki paces forth! A manga classic!

Won the 2nd Kodansha Manga Award for Shoujo in 1978.

From Shoujo Manga Maniac:

Lin is an average high school girl who has a huge crush on Daiwen, a popular TV host. Super Pop singer Gonjieh, who is Daiwen's enemy, transferred 6 months ago to Mushroom College. Phoebe and Jia are Lin's best friends and luckily end up in the same class. Unfortunately for them, Lienze, the no.1 delinquent in her school and who scares the living daylights out of Lin, also happens to be in her class. To make things worse, Lin's uncle appears, who she says is the root of all trouble. How will Lin survive?

From Shoujo Sense:

The seven seconds we fell in love, the fifteen minutes we spent holding hands while going home, and the two weeks we spent together. They're all my lifelong memories. How will this limited time love develop...?

A oneshot by NisiOisin and Miyokawa Masaru:

Sunaki is a back-up player on the baseball team. One day, he finally gets the courage to put a love letter into the school idol's shoe locker, but where will his actions take him?

(The title is a play on words: 変身願望! (Henshin Ganbou!), or Desire for Change!, vs 返信願望! (Henshin Ganbou!), or Desire for a Reply!)

Oneshot from NisiOisin and Kawada Yuuya:

A boy suddenly wakes up to find out he's in the body of a high School girl. Who is she and how did he switch bodies?

From CoyoMoose:

Kogure is a normal high-school girl who loves shoujo manga and food. She wants to fall in love, however there is one big problem - she's terrified of real guys. Then, one day, she runs into her ideal guy, and he's real!

Akari is an unfashionable first-year high school student who just moved from the countryside to the big city. While taking pictures of "Nana-chan," a huge mannequin at the mall, Akari accidentally bumps into a handsome boy who compliments her on her eyes. Little does she know that the boy who has taken a fascination with her is actually Kanda, an extremely fashionable model and the heartthrob at her new school! What happens when he decides to make Akari stylish enough to land on the front cover of a magazine?

A story about Kawai-san taking music classes to be together with the senpai she loves. The problem is that her life is made unbearable by the sullen and strict drummer Ichibashi-san.

Another installment featuring Kawai-san and Ichibashi-san

Collection of stories:

1-2. 16-sai, Shinkon Hajimemashita
Getting married at16th birthday? Swayed by the husband's unreasoning love?
When she was six, Sou-chan promised Wakaba that he would marry her when she turns 16. Ten years later, does Sou-chan still remember the promise he made? Can Wakaba be honest with her own feelings?
What will happen when Sou-chan's father's company goes bankrupt?

3. Akuma no Yuuwaku ni, Amaku Torokeru
Matsutani Mika wants to protect the pastry shop her father left her but lately no customer visits her shop. Can Katsuya help her?

4. Idol-sama wa Watashi ni Muchuu?!
An aspiring idol group 'Infinity three' and its manager are working hard to reach the top position when a scandal happens. Will the team break up?

5. (Sokuhou) Class no Ikemen ga Watashi no Kamikyoku ni Muchuu na Ken
Ichika lhas a passion for making Vocalo songs, but is just too shy to ask people to listen to them. One day she goes to her classroom to find the popular Iori-kun crying to her music?

A contemporary twist to "Cinderalla" where a popular but uptight bishounen Kosaka Seiji makes a plain girl his dance partner to test his skills and turn her into a beauty.

The student council president is gaga over the vice president, but her feelings may or may not be returned. In the meantime, it's up to the serious and by-the-book vice president to keep the flaky (but surprisingly effective) president on track.