From Day of the River:

Since her parents are a little bit slow, Matsuda Erika (or Eri for short) has taught herself to be independent and extremely reliable. Moreover, she devotes herself to taking care of those around her—even if some of her classmates find her behaviour overbearing and annoying. One day, a strange new transfer student is introduced to her class. This boy speaks in choppy sentences, has little to no facial expressions, and goes by the name Nokina Kaname. Instantly, Eri feels compelled to take care of this martian-like new boy in her class.

This manga is a revised version of "Kimi to Hatsukoi", a one-shot found in Mako to Aki-chan no Koigokoro.

The oneshot "Kirai, Suki?" included at the end of the story has yet to be translated.

A playboy who has gone through countless girls; a pure, lovely girl whose only love is chicken cutlets; a super gifted student who spouts poetry and songs about fried chicken cutlets; a blond hyperactive boy who chases after girls with chicken cutlet deliveries three times a day; the student council president Wei Luo Li who moves people's hearts everywhere, and also the truth of the BL headline story published in the school newspaper...
The legendary stories happening at Rembrandt High School are just that unbelievable!
Includes side story to "Proud Dragon Showy Phoenix", which was published in Butterfly Likes to Read

Contains one main story and two one-shots.

The heroine is a girl who has no clue about romance.

Her point of view :
My childhood friend is a cute guy, and he always come to my house in the morning to wake me up. Although he can be quite mean sometimes, being with him makes me feel very happy. But, once the fact that we're not dating became known, many girls began to hit on him, and start to confess. But, it seems that I feel something towards him lately! Whatever should I do now?

Extra 1 : The Witch's Sweetheart
Extra 2 : Victory or Defeat : The Unbeaten Love

Cherry Juice is about Otome and Minami, two step-siblings. Minami is a popular boy who takes cooking at school, and Otome is an average girl who is in love with Minami's best friend. Cherry Juice's main focus is on the love lives of Minami and Otome, who are in love with other people....or are they?

From Forbidden Garden:
Manami, a highschool girl, joined the class party where there was fun, laughter, and drinking. She had the best night of her life until the next morning, when she woke up to find that she wasn't alone. She quickly looks over to see that lying next to her is her "friend" Motoyoshi Hajime. Did they actually do anything together?!! To the inexperienced Manami, her world is turned up-side down as she tries to figure out how to deal with this situation...

Includes:

1. Cherries Fight
2. The Fastidious Princess and the "Mature" Prince
3. Miss Pageant's Anego. Kakei Masumi ran an all-girl gang in middle school. Now in high-school she tries to bury her past, pose as a bookish honor student--and keep a tight leash on her temper. All this is at risk when Ohara-kun picks her to compete in the school pageant. Why her?
4. Secret Incompetent Swordman

From Tokyopop:

Naka is an aspiring young model with a problem: her face tenses up into a terrifying spectacle whenever she gets nervous on photo shoots! Naka's rival is Umi, the hottest model at their agency. But Naka soon discovers Umi's secret--and hilarity ensues behind the cameras!

From Aerandria Scans:

Young master Hewlett is a famous work-a-holic watch-maker whose one dream is to make watches only for people who appreciate and love them. And exactly when he thought he’d never meet such a person, his faithful butler Jill made him attend a tea-party where he met the new maid Mulara. And her first words were that her greatest treasure ever is one of master Hewlett’s old watches...

Tough, lazy, money lover, yet beautiful high school student named Shin Bia. While she's thinking about the eras she suddenly falls into that ancient time period! She had to transform into an elegant lady and while she's there she faces quite an obstacle.

Sachi goes to an all-girls high school, and is quite the clueless one. At her first goukoun, she meets a boy called Yuki-chan, which finally ends 17 years of a boyfriend-less life, and!? -- Manga Updates

Seda has it tough. Her school has suddenly gone from a girl's only school to co-ed. Plus, her father could be described as a Korean Scrooge.
But with the boys coming into her life, being late for the bus isn't the only thing she needs to worry about.

Sasami is the type of girl who gets easily pushed around at school. One day, a rambunctious young boy named Kou causes trouble in school and unknowingly drops a strange piece of candy. Sasami returns it to him, and he suddenly asks her to marry him! Will Sasami accept his proposal, or will she completely reject it?

Volume contains: main story (chs.1-3) + 3 oneshots

(from PocketScans)

From Esthétique: Rin is tomboyish 14-year-old who lives with her grandpa in a small village out in the countryside. After her grandpa's death, Rin is obligated to leave her village to live with her mother in Tokyo. When she arrives, she discovers an amazing secret: her mother is not an office lady, but a famous model called Myu Suzuki! After one night of reunion, Rin's mother leaves to follow some guy to some foreign country without any notice other than a letter. Without any money to survive on (her mom did not know grandpa died), and the contract between Myu and the model company, what is Rin is to do?

From Nagareboshi Manga:

Tsubame's school has two sections: the school for regular students, and a school for "celebrities" (known as the fine arts course, or the "celeb course"). Tsubame's stuck in the normal school, and has no interest in the upper class life. Then she meets Chio, a male model taking the celeb course. Her life will never be the same again.

Anise can't believe her luck when she finds herself in the same high school as famous former child star Siva. Although the cool and handsome Siva seems unapproachable, Anise manages to become his friend. But her happiness turns to surprise when she discovers Siva's secret: for years, he's been switching identities with his twin brother, Cipher!

Shin Gyu Yun is the heir of the Shin Oong Group and the self-proclaimed prince of Korea's economy. However, he has a secret. Since his father left them before Shin was born, he can't help but clean things due to his past of helping out his mother with the chores. It wasn't until that Shin's mother died in an accident that he came to know his scheming step-sisters by moving into his father's estate. The step-sisters conspire to make him lose his position... but could that have made him fall in love with a low-class girl?

Cute and child-like high schooler Suzu has an affinity with animals. She wasn't aware of just how much so until the day a large black cat literally falls into her arms! She wakes up after taking the injured cat home to treat its wounds, and finds a naked boy, "Noa" in her bedroom! He claims to be the cat, "Noir".

It appears that someone is after Noir as they are suddenly attacked by cats. Suzu can sense they are being controlled against their will. After their escape Noir/Noa is impressed by her bravery and the fact that she can understand animals--so much so that he asks her to have his babies!

Poor Suzu, what is she to do with this cat-boy who's determined to stay close to her, VERY close? And what of those who are just as determined to get Noir back?

From Manga Art:
Miyu, whose mom was chosen to be an astronaut, was sent to live with Kanata, a boy she just met. Soon after, Kanata's father leave the two to live alone. Amidst the panic, a mysterious UFO came... and out popped Ruu and his babysitter-pet Wannya. For the sake of Ruu, the four of them start living together......

When he was younger, Kujou Kiyosumi was incredibly awkward and nerdy. One day in elementary school, he courageously confessed his love to a girl, but she told him in front of the whole classroom that he was "disgusting" to be around.

Shocked, Kiyosumi asked the coolest guy in the class, Sagiya Maki, to help him become more likable, too. Thus began the days of training and now in high school, he had finally achieved most popular status alongside Maki. Everything seemed to be going along smoothly until...

Sumi is in love with Mitsuru, but he doesn't seem to be interested in her as a woman. Determined to look more sexy and mature, Sumi takes an experimental growth hormone that her scientist father has been developing. However, the medicine backfires. Instead of changing into a buxom femme fatale, Sumi changes into a beautiful young man! She--he--is so gorgeous and so cool that even Mitsuru begins to take notice. Although the new situation with Mitsuru is imperfect, Sumi discovers that she can be closer to her crush: they can talk man-to-man. Yet, being Mitsuru's friend also has a downside, particularly when he reveals that he is in love with a girl in his grade!