From Enchantment Scans and Fate:

There are seven love charms that are circulated at Ayase Academy. Trusting those, Ritsuka believes that she will have a wonderful boyfriend. However, Kuze-kun, who's super scary and infamous at school, keeps getting in her way... Will Ritsuka find the love of her destiny?!

From Manga Abyss:

1-3) Ubatte Agemasu
The greatest, wholehearted, female loving wild animal story in the history of Cheese! Onizuka descends! A super sweet love story!

4) Akuma na Motokare (Devil Ex-Boyfriend)
Once a boy and a girl got separated. They knew it was something forbidden, but their lips met to be sure. "Does he love me?" The body is burnt, a passionate love.

5) Fake na Kanojo

"They say in this world there are three people with the same face, but I never imagined one of them would be a boy in my class..."

A boy and his senpai get kinky in a classroom after school.This manga contains tentacle play and is not for the weak of heart. You have been warned.

Yuu is a healthy high school student who harbors a crush for his Kyouko sensei. He absolutely loves everything about her and after fretting about the subject for some time he decides to confess; to his surprise Kyouko Sensei is also in love with him and agrees to date him..... The catch is that Yuu doesn't know why Sensei is in love with him, neither he knows her preferences when it comes to how to behave to her partner....And by the time of when Yuu learns this we have that "Yuumi" is born, now Yuu doesn't know if he should somehow enjoy his new relationship or regret it. Same author of Amaharakun-plusThis is the sequel to sensei no Bokuhttp://www.mangaupdates.com/series.html?id=67379

From Which Scanlations: It's been a month since she entered high school, and Jun has started noticing a particular guy hanging around her classroom. When he suddenly confesses, she's not sure where she even knows him from--or how she feels about him. But come what may, he seems pretty intent on sticking around...

Shinjou Shouryuu is a healthy 17-year-old high-school boy. Many of his kouhai wonder why such a great guy doesn't have a girlfriend. Ask him and he'll tell you that between school, work, and saving his kouhais from bullies doesn't leave him much time to go on dates. So he instead goes online to "F.I.L. GATES". There in the chat room his alter-ego, Kakeru, is infatuated with the girl called Hal. Hal sends a message reminding him that Sunday will be the six month anniversary of when they first met (online) and that she wants to meet him in person! And let's just say it's not your typical first date.

This manga is about the romance and complexities of an internet relationship.

Nicknamed “The Prude,” Aizome Maiko is a misunderstood girl who actually has explicit fantasies. When a boy with a delinquent’s face, Yajima Keisuke, ruins her dream romantic encounter, she forces him into slavery by getting him to carry out her ridiculous plan to reach the man of her dreams. What has “The Prude” have in store for Yajima and will her ridiculous plan succeed?

Fourth spin-off of Papa no Iukoto wo Kikinasai! (http://www.mangadeer.com/search?q=papa-no-iukoto-wo-kikinasai), in which Hina is the protagonist. Between all the spin-off, this one is the more cute, akin to Love so Life.

The younger of three sisters, Hina Takanashi, is an energetic and good-natured 3 year old. The three sisters lost their parents in a plane accident. They now live with their 19-year old uncle, who is struggling to keep the family united and happy... and little Hina brings her happy mood to brighten the darker days. This spin-off story is parallel to the main series.

A collection of short stories:

1 Junjou Erotica (Pure Erotica)
Heartbroken by her first love, senior high year 2 student Rika develops a fear of romance. One day, she finds out her first love's weak point! From then on, she starts her revenge...

Extra: Passionate Erotica (unscanlated)

2 Renai Teppen Shugi (Romance Summit Principle)
The two most popular people in school, Rinko and Shirou, are pretending to be a couple to keep people from confessing to them. Rinko is slowly falling in love with Shirou, so what happens when someone finds out about their fake relationship?

3 Romeo na Kanojo (My Girlfriend Is Romeo)
Seiya was the prince of his school until a new girl, Ryou, transferred in. "If I can't win against her, my only other option is to make her fall for me!"

4 Ouji to Kiss to Nemurihime (Prince & Kiss & Sleeping Beauty)
Shiya has a phobia with boys. What can she do, but ask the almighty ?prince? of the school for help? The prince is shocked that this girl doesn?t like him, and decides to make her fall in love with him! But Shiya has a weird curse: every time a boy touches her, she faints!

A collection of stories:

1-3. Tadashii Ace no Kouryakuhou
a.) Hiroto Fujiki is the ace on his high-school baseball team. He takes an interest in one of his groupies, only to find out that "she" is not who "she" appears to be.
b.) Ayumu Tsumori is acting as the manager of his school's baseball team, and he borrows a book from his sister to help improve their chances in an upcoming match. Following the book's instructions, Ayumu starts cross-dressing for the team.
c.) Masaki Mizuhara fills in on his sister's baseball team, and catches the eye of the team's ace pitcher Hirona Fujiki, the sister to Hiroto from the first oneshot.

4. Hypnotism Trick
When Touri Hirahara is hanging out with his two friends Kashiwagi and Kunieda, Kashiwagi says he can use hypnosis, so Touri decides to fake being hypnotized. However, things get out of hand when Kashiwagi "hypnotizes" him into believing he's a girl.

5. Ani Tsura
Kazuki Hasegawa started drifting apart from his younger brother Kazuomi after he started getting interested in anime, specifically a certain magical girl anime he's particularly obsessed with. Kazuomi has been doing bad on his tests, so Kazuki agrees to dress up as Kazumi from the magical girl anime so that he'll put more effort into studying.

6. Khaki P to Sumire-hime
Rei Kawasumi is the vocalist of his high school band Violets, but they're not very popular, so Rei goes to ask the advice of Haruhiko Tsuchiya, a popular composer who posts his songs online under the name Khaki P. Tsuchiya tells Rei that to gain popularity, he has to not only cross-dress, but also sound and act like a girl.

7. Moshi Bare
Rin Aihara transfers to a new school, but tries to keep her intense love of baseball a secret.

From Evil Flowers:

Kurosu Riri is very bored with her school life. In an attempt to do something new she tries to form a band with Ayata and Jin. But something is still missing, a former member, Ruki Sugisaki is needed in order to have the complete band. The only problem is that he's in a fight with Ayata. Will Riri be able to make things work for her band and make Ruki join? Better yet, to have it formed before it falls apart...

From Adachi's Universe:

Slow Step follow the adventures of school girl Minatsu as she looks for a man and tries to stay on top at school. She's got the school bully to worry about, two potential suitors, a pervert for a PE teacher, and a gang of criminals in hot pursuit.

Manga adaptation of the (in)famous dating bird game.

From An Endless Story:
7 years ago she received a goldfish at a summer festival. The goldfish is named after her beloved Jin. But Jin, her childhood friend, will be leaving home. At the time, those words were uttered unexpectedly...

From Simple Scans:
Volume consists of five separate story lines + sidestory:
愛し金魚
real intention
星のロマン
LIFE IS WHITE...?
YOUR VOICE
巻末描きおろしショ－ト (sidestory)

Nakano Fudanshi Gakuen is a school renowned for its sports program, yet only has an average school rating of 50! Within the school, there is a club on the verge of losing its official status called "Fudanjuku". The club's theme is, to put it simply, "anything-goes". This story is a slapstick school comedy revolving around the unique seven members and their various troubles.

The tale of a boy who falls in love "at no sight." It seems that everyone has met her BUT him.

After a crazy night with an unknown beauty, a young teacher is tricked into becoming the father of two gorgeous young girls. Will they be able to accept him as their father when his male imagination is running wild?