From Chinatown KM:

Ai has always believed that her cooking is really good, despite not being able to taste anything. She enjoys school life with her two friends. So what will happen when the famous VJ, Daiwen, asks her out? And what will happen when she finds out how bad her cooking truly is? So what has Lansi really been eating...?

High-school student Ao decides he’s in love with Ryoumei-san, a priest at the local shrine and Ao’s childhood friend. Not one to beat around the bush, Ao immediately tells Ryoumei he wants to do perverted things together, but it will take more than a little persuading to get the shocked Ryoumei into bed. Between bad advice, romantic rivals, and Ryoumei’s scruples, there are many obstacles in the path of true love.

Note: Shunpei from Koi Cha no Osahou appears in this story as the main character's best friend.

From Viz: Although Tsukushi Makino is from a poor family, she attends an elite school for the super rich, where her life has become intertwined with the "F4," the ruling boys of the school, in a whirlwind of love and confusion! In 1996 Hana yori Dango received the Shogakukan Manga Award for shōjo. This is the best selling shoujo manga in history. Boys over Flowers officially ended with volume 36, but Yoko Kamio, just couldn't stay away from her beloved characters! Boys Over Flowers: Jewelry Box (Boys Over Flowers: Hana Yori Dango Some call it Volume 37) contains two short stories that take place 1 year after the end of Boys over Flowers volume 36. It also contains a section with some of the important events in the series that show the characters maturing, plus a special bonus strip! .

Rushuna is a blonde and very beautiful senshi (gun expert) that travels through the world with one purpose. This is to make the world a peaceful place by, instead of fighting with weapons, taking away people´s will to fight by giving them a smile. Although she doesn´t want to fight, she is forced to and shows amazing gun skills. In this journey she meets Yajiro, a mercenary swordsman, who joins her on her journey.

The story revolves around an innocent, naive schoolgirl, Yume, who falls in love with a gorgeous ex-Yankee, Shoubu. Meanwhile, Yume's best friend, Roko, falls for Shoubu's best friend, Yuuji, who is a playboy.

"If you were a girl, we would never have met."
"Well- to...to be honest with you- I AM a girl-"
Plain when she is a girl, but HOT when she is a guy.
Choi Ida wants no more then to relieve her stress and anger when she is off work as the alternative identity Yodah, due to the pressure of being Mimi's slave at both school and home.
One day in the park, free from Mimi, she meets Kang Naru, who kisses her as Ida, not as Yodah (her male self).
Despite thinking that Yodah is a guy, Naru falls in love with her.
But when Mimi finds out about Ida's secret identity, she threatens to tell Naru if Ida doesn't break up with the flower boy. What will she do when both of her lives are at risk?

A series of related stories about (a lot of) middle and high school students as they discover their hatsukoi (first love).

From Serenus-Dreamers:

Midori lost her mother when she was young and now her father's gone too. But her dad left her with a surprise: a fiancée named Tetsuya. So now, Midori has to live in a good-looking men only apartment (Harem Lodge), which is actually filled with weirdos. What is going to happen to her? Well we just have to wait and see...

The energetic Natsumi is a newly employed at a Housemaking company. She works hard to get Section Chief Tohjoh's (who she fell in love with at first sight) approval, but she can't seem to get things right. Then one day, Natsumi gets a chance to prove herself to Tohjoh. Will she finally get Tohjoh's attention?

From Viz:
In order to help her father, Chiwa Takanashi agrees to an arranged marriage with the company president Hokuto Mamiya – a man she doesn’t know – at the request of Hokuto’s grandfather. Chiwa believes the arrangement isn’t binding, but her new partner seems to think otherwise. Can two strangers living together find their way to a happy marriage?!

15-years-ago Vivi, the demon, decided to leave the demon realm and come to the human world. There he found an abandoned baby and on a whim decided to keep it. Since then he lives together with Hana... but having a 14 year-old girl around you, is it really that simple?

In the spring of Kyoko's first year in high school, Eiko, a girl like a sister to her, returns with her younger brother, Jiro. The return isn't that big of a deal, but Jiro (self-proclaimed super mad scientist) has it in his head that he wants to operate on Kyoko! And, what's even more, the two of them are actually high ranking members of an evil organization on the run from the heroes of justice!
As if high school didn't have enough problems already, now she has to deal with these two living with her.

Kurosaka Gengo is just your normal highschool boy, who likes to skip cleaning duty. However, Gengo's peaceful life ends when he comes across a strange man. That man claims to be an alien and is in need of Gengo's body to survive on earth. Not only does Gengo deal with the alien, but with others that are after him!

Meet Eikichi Onizuka a 22-year-old ex-biker. He's crude, foul-mouthed, and has a split-second temper. His unlikely goal: to be the Greatest High School Teacher in the World! Of course, the only reason he wants to be a teacher is so he can try to score with the hot students. Before he can become a full instructor, he's got to work as a student teacher to earn his credentials. Onizuka may think he's the toughest guy on campus, but when he meets his class full of bullies, blackmailers, and scheming sadists, he'll have to prove it.

Note: Won the 22nd Kodansha Manga Award for Best Shounen Manga.

From Yen Press:

Monarchy ended long ago in Korea, but there are still other countries with Kings, Queens, princes and princesses. What if Korea had continued monarchism? What if all the beautiful palaces which are now only historical relics were actually filled with people? What if the glamorous royal family still maintained the palace customs? Welcome to a world where Korea still has the royal family living their lives! But for Che-Kyung, a high-school girl, this is a tragedy, since she has to marry the prince who turns out to be a total jerk!

Nao Yoshikawa stays behind to live by herself when her parents leave to inherit her grandpa's farm in the country. On the day she moves into her new apartment, she discovers that it was rented also to Hisashi Uehara--a cute, super-cool, popular guy from her school. Not only did their housing agency unexpectedly close down, the landlord of the apartment tells them that they had to pay more for their apartment than they had expected. With no money and no home to return to, Nao and Hisashi decide to live together as flatmates.

*Contains a oneshot called
Kare to Kanojo ni Hanataba wo
(His and Her Fortune Bouquet) in vol. 1:
Harumi has been tricked by good looking guys before, but what if Kazuya is different?

Behold the the struggle of the adorable little cockroach Gokicha-chan as she struggles to make friends with humans after moving to frigid Hokkaido to escape the unfortunate reputation her species enjoys in the Kanto region.

From Nagareboshi Manga:

Mao has just graduated middle school, and due to where she lives, she has to go to a different school from all her friends. While trying to find her new classroom, Mao stumbles upon a boy being bullied. She gets the bullies to go away, only to find that the boy, Riku, wasn't being bullied at all. Nonetheless, Riku respects her now, and refers to her as "Prince," for saving him. How will their relationship continue...?

1) Zenbu Shiritai
(I Want to Know Everything)
I won’t act spoiled in front of my boyfriend, and I definitely won’t trouble him, either. I’m trying to act like a cool and mature ideal girlfriend, but the truth is, I’m a persistent and annoying girl who wants to be pampered by her boyfriend! Even though I'm hiding my true self from him, to satisfy my evil desires, I’m stalking my beloved boyfriend!!

2) Sakasama Honey
(Upside Down Honey)
Kameyama Chisato is a girl without boyfriend, because of her sadistic personality. While trying to fix it by secretly practicing with a skeleton in the Biology lab, a classmate named Kurosawa Akihiro sees her. What will happen to her secret?! Will Chisato ever find love??

3) Chiru Chiru Michiru
(Fall, Fall, Rise/ Broken-hearted Michiru)
Michiru is a girl with poor luck when it comes to love. She’s been dumped several times by her boyfriends for other girls. After her latest breakup, she feels really dejected. In her attempt to get over her love, she pretends as if she's about to commit suicide. However, a boy from her school, who is rumoured to be a delinquent, stops her, and promises her that he’ll introduce her to the best guy on earth. Just who is this 'best guy on earth' and where can he be found? Or is he right in front of Michiru’s eyes?

4) Ashita Hanabi ga Agattara
(When There's Fireworks Tomorrow)
Tomoe has a dreamー to go to the fireworks display during the summer together with the guy she likes. However, she hasn’t found that spark of love at all, at least, not until her childhood friend, Miki, moves back to her school and she meets Kagami through him! She makes the perfect plan to confess to him, but that doesn’t go as well as she had hoped, when Kagami confesses to her that he really likes Tomoe’s best friend, Rikka! Is the friendship ruined between these best friends now? And will Tomoe be able to fulfill her dream of watching the fireworks with someone she loves?

5) Super✰Star
There’s a certain group of guys in Kiyoko’s class that stands out, and to Kiyoko, Hoshino stands out the most! In fact, whenever she sees him, he looks like he’s sparkling. However, Kiyoko realises that Hoshino isn’t exactly what he seems to be, when she discovers him working at his family’s run-down convenience store! But even in his dull work clothes, Hoshino is still sparkling to her. But it’s not until Hoshino is confessed to by another girl that Kiyoko truly realizes that even if she’s different from Hoshino’s ideal girl, she still has a chance… but is it too late now for her?

From Tenshi-Tachi:

Yanagisawa Aiku is the president of the flower-arranging club. In order to save her club from being closed down, she agrees to go out with Hosaka Ryousei, the extremely handsome president of the student council. However, the only problem is that Ryousei is always in love with one girl after another. Aiku is just another girl to him... or is she?