From Ivyscan:
Consists of 4 short stories.

1. Orange Kiss
Kijima Aka had a dream. In the dream, she and an orange haired boy kissed under the setting sun. And that boy just so happens to be the guy who's in the same class as her, Shimizu! She always thought Shimizu had some kind of grudge against her because he seems to hate her. Will Aka's dream become reality?

2. Happy Words
The story of the past of the main characters, Saiko and Ichi, from "No. 1 Girl" in the tankubon Caramel Milk Tea.

3. Last Train Under the Night Sky

4. More Orange Kiss

Includes "Another Usami's Biography."

From Chibi Manga:

Her parents decided to go overseas and she's to live in the house of her father’s friend. "In that luxury mansion, there are beautiful boys!" she thought for a brief moment. But these two brothers are trying to get her out of the house and things happen to be taken a little too far...!?

Twelve-year-old junior high school girl Hasumi Kohaku moved into town in search of her mother. She is gifted with ESP and the ability to fly-- well, only when the sun is down. Otherwise the sun could make her power fade away. Kohaku soon uses her powers in front of her classmates, in order to save her friend Yuuro from falling out a window... but during the day!

Sarashina Tsumugi is a new transfer student who is thrilled to finally be able to go to the school her mother graduated from. It's still summer break, but Tsumugi arrives at the school early for an assembly.

Almost immediately after setting foot on campus, she encounters two guys and a girl arguing apparently fighting over a ring. The girl is trying to break up the argument, but her actions don’t help much. In the scuffle, the ring goes flying through the air and lands down Tsumugi’s uniform blouse! One of the guys pounces on Tsumugi, tearing her blouse open while chasing after the ring!

Shocked and horrified, Tsumugi slaps him and desperately tries to cover herself. What is wrong with the people at this school! Anger immediately sets in, and she yells at both guys, reprimanding them for their actions. Her anger is so fierce, that they immediately apologize.

Tsumugi learns that these guys are cousins: Ibara Chitose and Ibara Hajime. Although Tsumugi has a bad impression of them, it turns out that Hajime and Chitose are extremely popular. They are even related to the school superintendent and currently serve as co-vice presidents of the student council! And what's this being super close? After the scene earlier she knows they are nothing but liars: they didn’t get along AT ALL!

After finally reaching the morning assembly, she hears her name being called. Ibara Chitose, looking rather smug, has just declared that Tsumugi is their endorsed candidate for the next Student Council President! What will become of her peaceful school life!?

A collection of six stories.

I. I'm Not Afraid of the Wolf!.
II. Occult Detective Group - Part 1.
III. Occult Detective Group - Part 2.
IV. Horror Angel.
V. Tonda Birthday Present.
VI. Ookami Nante Kowakunai!!.

From Stage Storm:

Tomomi is secretly in love with her classmate Sawada. But her love couldn't be fulfilled as Sawada is in love with another girl. Meanwhile, Ojika, the head of the broadcast club, is trying to win Tomomi's heart with his handsome voice. Finally Tomomi's gloom is driven away. She starts to see the hidden beauty of the things around her which she has never noticed before.

The series is about 23-year-old Canadian Scott Pilgrim, a slacker and part-time musician who lives in Toronto and plays bass guitar in the band Sex Bob-omb. He falls in love with American delivery girl Ramona Flowers, but must defeat her seven evil exes in order to date her.

Tokunaga-kun, Chiharu Taniyama's classmate and recent neighbor, is always laughing at her, and it annoys her to no end. How can she be cute? Then, she finds a magazine with tips on being popular. Will she get her revenge on Tokunaga?

From Royal Alliance:

Sensei, please teach me about love.
Senou Miku is a normal high-school girl. On the day that she had her first boyfriend, her mother had a job transfer. And then, her guardian, who came to live with her, turned out to be her homeroom teacher, Nishizono-sensei...

A cute oneshot about a gyaru chasing her high-school classmate.

From Shoujo Crusade:

1. Otona no Shoumei
Tsubaki always appears experienced, but actually, she has never had a boyfriend even though she's already 16, and she's a real baby. She wants to quickly increase her love experiences, and become an adult! One day, she got called out by her math teacher, Shiina-sensei, and she was told that she'll have to take supplementary lessons. All alone in the math room with her sensei after school, Tsubaki's heart beat like crazy when she saw Shiina-sensei's facial expressions that were different from usual...?

2. The Imprisoned Princess
My hard work's finally been paid off! All that studying have invited me to "ouji-sama's" house! I couldn't be more happier! But wait, why do I have to clean his house?!

3. The Prince's Mantle
Continuation of the second story. Ouji-sama and I are now a couple! Many may admire me, but he is indeed not a 'real' ouji. I still love him though...

4. The Upside Down Message
I have always loved my childhood friend. Every valentines day, I send him "chocolate messages". But, he has a harem of girls? Without thinking, I told him I like senpai, but the one I really love is him...

From Lezhin:

Gayoon decides to enroll into a high school far away from home just to be closer to Soha, her middle school heroine and idol. Gayoon finds out about Soha's loss and decides to help her by filling the role of Soha's once true friend - Happy, Soha's pet dog.

Official Webcomic
Official English Translation

From Lovers Dream:

Alone and dumped outside of a love hotel, Mitsuka finds herself caught by the last person she wants to see--her school counselor and teacher, Kaga-sensei! Instead of turning her in, Kaga-sensei wants an interview. It turns out he's an erotic novelist, and he's looking for just the right dose of high school girl reality for his latest work. Kaga makes it clear their relationship is strictly business, but can Mitsuka keep it that way when she's falling for her teacher?

Volume 1 includes extra story: Then, Will You Fall In Love With Me?

Volume 2 includes extra story: Money Makes Being In Love Go Round

Toko is a third-year high-school student who's been active in the ping pong club. One day, the teacher she likes, Katakura-sensei, quit being the ping pong club advisor and went to head the history club. Going to check out the people who 'stole' her precious teacher, Toko finds herself applying to join the history club! The three other members, Ren, Maria, and Naho, might be suspicious of her intentions, but at least she'll be near Katakura-sensei once again!

In the Kokoro series:

Vol.1 - Otokogokoro (A Man's Heart)

1 & 2. Otokogokoro & Otonagokoro
Salary man Saki almost makes it home but passes out from fever just as college student Shinomiya passes by. When Saki comes to he realizes he's in a strange apartment and Shinomiya has been taking care of him for the past two days! Not wanting to be indebted, Saki tries to repay him as thanks but Shinomiya's having nothing of it. Luckily, Saki's pretty creative when coming up with a way to express his gratitude that has them both wanting more...

3-4. Kiss Kiss Kiss

5. Nibukoi (Dull Love)

6. Hiiragi-senpai no Koi no Ohanashi

7. W Pure

Vol.2 - Koibitogokoro (Heart of Lover)

Vol.3 - Koigokoro (Heart of Love)

Vol.4 - Tokimekigokoro (Heart of Excitement)

The number of chapters comprising the main story in each book is as follows:
Otokogokoro (2 chapters),
Koibitogokoro (6 chapters + omake) entire book,
Koigokoro (2 chapters + omake), and
Tokimekigokoro (5 chapters + extras) entire book.

From Intercross:

The moment that Rio opens a book that she found by chance, she gets sucked into another world. There she meets a guy that she sees in her dream every night. His name is Tsukishiro. He's a magician who controls the story world, and his mission is to take a "princess" from the outside world there. He asks Rio to be act as the princess and complete the tale "Cinderella", however...

Also contains:
- Burning Heat On My Lips (Kuchibiru ni Tomoru Netsu)
Weak bodied Naruse Momo gets entangled with the reknowned playboy, Toomine Hazuki, at the infirmary.

- In Love with the Wolf (Ouji Tokidoki Ookami)
The theater club will be remaking "Little Red Riding Hood" for the school festival and Enomoto Aria is in charge of the script...

- What Resounds in My Heart Is Your Sound (Mune ni Hibiku wa Kimi no Oto)
That boy keeps playing the song she hates and he won't stop playing it until she can remember the title.

Compilation of short stories:

1) Pet wa Binyanshi.
Shy girl Ruho has a secret. She keeps a cat named Kuro in the garden behind the school. One day while calling Kuro, a bishie answers. "Kuro here...!"
What?!

2) Tenori Life

3) My Boyfriend is a Vampire

4) Sono-saki wa Kindan Ryōiki

5) Tsutsumu Tenohira Sasu Yubisaki

6) Pet wa Binyanshi. Extra Chapter: Handsome Rival.

A lighthearted comedy involving elementary school kids.

From Loyal Kiss:

Bishie boy that got transferred and visited Ohn Noori, Lee Sun-Uh. I was surely suprised that my father, who I never met myself, had sent him, but to say he's one of my fiancé candidates!

AND WHAT?
My father is the king of a secret kingdom?
Oh my~ ♥
Then I... am a princess?

With two fiancé candidates, I ended up with a happy headache...
Ahhhh~ ♥
Who should I pick to make the right choice?

From KodanClub:
Akira Shindo has been transferred to Fuga High School where she is almost raped by a group of young thugs. She meets Mahiru Suruga, a mysterious but beautiful girl with both arms in bandages. Mahiru is aloof and cold. Her motto is, "I will neither rely on others nor have anything to do with others." The two girls get caught up in a series of incidents at school and Mahiru, a strong fighter, always manages to sort them out. Mahiru starts to soften up, as she becomes friends with Akira, who loves to stick her nose into other people's business.

Mahiru's school life is turned upside-down as many people approach her. Kaede is a high school student training as a swordmaster under a senile old man, who turns out to be a real pervert and a fake. Mahiru's father also comes into the story and things get chaotic.

One day, Satoru Tsunami, a high school student and an aspiring reporter starts following Mahiru. He deeply respects Mahiru and considers her the strongest high school student and a rebel against adults. Why is Mahiru so strong? Satoru tries to find out her secret. Why has Mahiru shut herself out? What is going on inside Mahiru's mind?