Goraku Gakuen is a school with over 300 clubs and student associations, and all of them are under the supervision of the Student Council. After encountering the Student Council President, Gokou Karuta, a girl who avoids most of the clubs, is asked to be the Secretary. Thus begins her work of inflitrating and monitoring the often wacky clubs...

Nanoka and Koshiro were separated at a young age when their parents divorced. Now, 10 years have passed, and Koshiro has already forgotten about his younger sister. Yet, Nanoka has decided to attend the nearby high school and come back to live with her father and brother. However, the two had met just before Nanoka came back to live together and without knowing each other's real identity, they went on a date, only to find out that they were actually siblings...

From Animexis:

On his way to school, Torii Akira helps a girl who was about to fall down. From that moment he keeps running into that girl, and she seems very happy to see Akira. Could this be the reason Akira can't help but smile all day?

Vanilla by SHIMOTSUKI Kayoko

Rui Hasegawa is an unusual boy whose thoughts and actions are believed to be unconsciously controlling the global population due to extraterrestrial influence from an alien known as "X". When he has thoughts of suicide, the suicide rate goes up. When he decides to start drinking more milk, milk consumption around the world doubles- even those who are allergic begin consuming it and have to be hospitalized. To combat this bizarre problem, a group of people have sent a boy named Iruma to spy on Rui and make sure his life is as "normal" as possible.

The appearance of a child. The years of an adult. Kounago Sensei. (4-koma)

N/A

from Sound of Jewels:

One day, Yukino received a weird message
from her best friend Saho.
Then when she came to school she heard about
her death. Truth is, she killed herself because
she was persecuted by her schoolmates...
So why is her last message "run"...?

(2) I’d Rather be Killed Under the Cherry Tree
Sasagawa is not the type who can easily make friends, yet Saho opens to her and they slowly end up to be the best of friends. When Yukino enters their group the balance is somehow broken. A short oneshot about friendship, love and betrayal. This is Sasagawa’s version of the story: Dead Friend’s Love Letter.
From Evil Flowers

By Shoujo Crusade: Sugimura Nozomi made a pact with her childhood friend Hyoudo Rei who both have a passion for ice-skating that when they grow up, they will both pair up to get into the Olympics. But then Rei moves away. Years later, Nozomi transfers to a school famous for its students' emphasis on ice skating. There she unexpectantly meets up with Rei only to find him indifferent to ice skating. But Nozomi will not give up on her dream even if Rei has and she's determined to make it to the school ice-skating club and bring Rei with her as her partner. Read this manga from right to left

1-4) If This Wish Comes True
About a trio of friends.

5) Beautiful Things
The protagonist likes to watch another girl because she's beautiful.

6) Love Letter

7) The Girl in Black
A girl protects the woman she loves.

8) Rain and First Love
About a worrywart and the girl who always assuages her worries.

9) Mahou no Jumon or Magical Incantation

Sadaki Kaoru, an earnest Literature professor who comes from a prestigious academy, hides in his heart the one-sided feelings he has for someone. One day, thanks to drawing the attention of the school troublemaker ‘Shou, the informant’ his secret is revealed. In exchange for Shou’s silence, he’ll have no choice but to have sex ‘till the point of exhaustion. The day-to-day of being raped by a young student begins!

A princess makes a friend at school, but her servant isn't pleased with him. Can he learn to be friends too, perhaps through photography?

Hikage is a reclusive 8th grader who no one seems to notice her. She finds comfort by planting a sunflower at school and in her blog, with only 2 people who comment on it, MegaPIG and Black Rabbit. They listen and give Hikage advice on everything. But, everything changes one day when two cute boys notice her. These boys are the most popular kids in the entire school, Teru and Hinata. When one of them tells her something that she's always wanted to hear, she might change to be like her classmates... Will she by loved by everyone in the class?

1. Koisuru Heart ga "NO" to lu
Sawa is a representative of the student council and the valedictorian of her grade. A teacher had asked Sawa to persuade Tatsuki who has been ditching school and have not been attending his classes. But when she goes to the Educational Guidance Room to speak with him she sees him fooling around with a girl. She decides to go to his house to talk to him, but he takes her out with him and tells her, “If you want me to attend school, all you have to do is kiss me once” but… At that time she thinks, I will really kiss you?!

2. Sonna Koi no Hanashi. (そんな恋の話。)
The popular Saho asks Takita-kun to pretend to be her boyfriend for a month to avoid the soon-to-graduate third year seniors from confessing to her. He agrees on the condition that Saho must not fall in love with him...

3. Dolce (ドルチェ)
Fujishima worries about her future when she hears the sweet sound of a piano playing. It is the annoying Tomonori that is playing...

4. The Kiss on Christmas Eve (聖夜のキス, Seiya no Kiss)
Yukino goes to a missionary school, and every day leading up to Christmas it is rehearsal for Christmas mass. Yukino is caught sneaking out of mass by Seiya, but instead of turning her in, he takes her on a date through a city in Christmas mood... Who is this Seiya anyway?

Hino Akiharu lost his parents when he was an elementary student and was taken in by his uncle's family. One day, he sees on the news about the newly-established Hakureiryou Gakuin, a school which was re-built from an elite girls' school. He decides to take the exam for that school and succeeds in entering the House Management Department (the place to train maids & butlers). He wants to become a butler, although his appearance scares the ladies. Akiharu has a sinister look in his eyes, a scar on his right eyebrow, and bristled up hair. Add 3 piercings on his ears and he indeed has a typical bad boy look on him. He meets his "nemesis" at that school, Saikyou Tomomi, a girl with a two faced character who traumatized him many times since they were kids. Another girl named Cernia Iori FlameHeart chases after him because of his looks and calls him suspicious. Still, Akiharu starts finding his feet at the school and his relationships with the girls also get better...

1. Mayoeru Kohitsuji wa Madoroi nagara mo
2. Hajikete Tansan, Natsu Moyou.
3. Sugarcraft wa Yuuten wo Shiranai
4. Shiroi Toiki wa Yakedo ni Nite
5. Anata wa, Watashi no

Series of self published stories related to Hidoku Shinaide.

We are not sure about the timeline in Yasashiku Shinaide doujinshis and they're still sophomore. Sensei made these DJ before she finished volume 2, but all the doujinshis Maya x Nemu relationship is lovey-dovey! Perhaps they've became lovers in doujinshi?

From JManga:

"Would you like to break up with me again or be held, which would you prefer?" My former friend with the beautiful face, whom I've run into again after so long, only says things that cause me trouble. In the winter of sixth grade, Kensuke was upset about having to separate from his best friend Hasekura in middle school, and ended up breaking off their friendship. Three years has passed since then, and Hasekura comes in contact with Kensuke like nothing had changed. Kensuke was happy they could repair their friendship, but Hasekura says something completely out of left field...

The school comedy focuses on the Psychometrer character Mitsuru Fukushima, who has fallen into debt because of his love of cosplay. He plans to commit suicide in the forest around Mount Fuji, but he encounters the dead body of a female teacher named Mitsuko Fukushima who looks just like him. He begins life anew in women's clothing, helping to reform delinquent students.