From Sensation Scans:

Seo Kyoung is pitiful. Everyone thinks she is, especially after making the wrong "friends," she now has to prove that she does have a boyfriend. She accidentally chooses the most popular guy in school... And... he starts to like her. But his best friend likes her too. What will happen?

A collection of oneshots:

1) ABC
Aki is in her first relationship with Yousuke, but he doesn't seem like such a great guy...

2) Nako's Love Letter
Suki's boyfriend, Tooya, is scary looking and always treats her like his servant. How does he really feel?

3) Snow Upon You, Flowers On My Heart
Yu has been asked to take care of his cousin, Sakura, who hasn't talked since she witnessed a car accident 4 years ago.

From DVD Asia.com: Left to the naive but good-hearted high school girl Cha Young-mi's own devices after the tragic loss of her parents, Young-mi is determined to overcome whatever hardships the future may bring in order to complete her education. Through the help of an invisible benefactor who pays for her tuition fees and other necessary expenses, Young-mi is able to finish her studies and is offered her dream job as program writer for a radio station. It is there that she meets and falls in love with her colleague Kim Joon-hoo. After Young-mi discovers a desperate message left behind by the former owner of her computer she decides to do something to help this heartbroken person …

From Red Scarlet Dots:
In an era of competitive Idols, there's one idol group that gazes over all of them, overwhelming the masses and leading the idol world, the incarnation of Zeus himself… “Jupiter”.

The most beautiful face, the perfect body, and a sincere personality... that's what Hwang Hyemin has. Naturally, she's the center of everyone's attention. Every boy in her school loves her, while every girl hates her out of their jealousy. Every single day, she has to endure tortures and hardships from the girls. There is nothing more satisfying than getting them back. Well, except for one problem: her secret crush, JongYon. Because of him, she has to hide her cynical and dark side and put an innocent face on daily. For him, she has to endure all the jealousy and suffering. Then one day, she found out that he dislikes her anyways!! WHAT?!? That's it! No more nice girl! And her first victim of rage is a playboy she just met, MaHa. Read Left To Right

Transferring to a new school is never easy. Still, Rui has a plan to make new friends -- after school clubs! Unfortunately, they're not that easy to find. The clubs are being closed down one by one, and further investigation reveals the culprit to be Natori, a fellow student -- and the guy Rui's father just betrothed her to! It's hard to make friends when your fiancé is the school bully, but Rui's not giving up. With the help of two cute boys, Rui forms a club that refuses to be shut down without a fight. As the Cy-Believers spread their message online, they're out of Natori's jurisdiction -- and Ctrl+Alt+Deleting all the rules!

Tsubasa has always been a little weird and detached, but when he gets dragged into a different world to rescue his supposedly lost mother, his brother Tokimaru knows that there is something more to his background. There they meet up with a mysterious character Shroud, captain of a pirate's ship, and he becomes an aid in their adventures. This is a very mild shounen ai series, but the story is very strong with lots of action, and all the characters are very memorable.

December 20th, 198X. Mysteriously, people across the globe witness the same dark dream. Soon after, the number of humans unable to wake from their sleep begins to increase steadily. There are reports of life-like "R-dreams" that are experienced collectively and haunted with "Zel" - nightmare creatures. Hokuto, a struggling art student, is doubtful of R-dreams until he falls into one. There, he meets new friends, battles with the Zel, and tries to understand the nature of this dangerous phenomenon.

Akane has a crush on the princely Yuu, but when she finds out he's living with super attractive Kei, she makes a deal with the other girl to move out of Yuu's house. But Kei insists on moving in with Akane, and is now running her ragged with demands! Will Akane get any chance with Yuu or will all her time be spent with Kei?

From Midnight Scans:

• Dakishimete Ii desu ka (Is It All Right to Hug You?)

“I can't bear to be separated from you, because you’re so cute.”
Because of Ushio’s excellent grades, he is forced to leave his beloved girlfriend, Ruka, and go to Tokyo University. Ruka is very beautiful, but also a little stupid, and other men frequently mess around with her, so he is worried that someone might take her from him, but if their relationship turns into a long-distance one…

• Hitorijime Shitai (I Want to Monopolize You)
Kaname has a crush on the top student Takashi, but being an idiot she thinks that she's never going to be good enough for him...

• Suki to Ienakute (I Can't Say I Like You)
Jun (?) is in love with his younger step sister Tsubomi, but he had already promised his dead step mother to always take care of her until she is an adult. As he takes care of her, he only grows more pain for this unrequited love, especially when she is soon to be moving with her boyfriend?

• Majo Sweets (Witch Sweets)
Chise has the coolest, manliest boyfriend Toranosuke who dreams to be a patisserie. Everyday, Chise hangs out with him to only eat his delicious cakes, but is that the only reason she dates him?

From NagareBoshi: Hina has just moved back to her old hometown, and transfers to the local school, North High. Little does she know about the rivalry between the gangs of North High and its opponent South High (the high school which her childhood friend, Kanata, attends). During her first week there, she is captured by gang leader Shuugo (enemy of Kanata).

Elizabeth March is one of four daughters from a prestigious family. The only reason she stands out from her sisters' extraordinary beauty and talent is because she's talentless. After her acceptance into the same academy at which all her sisters study, Elizabeth encountered a chain of interesting situations, including getting off to the wrong start with a rich boy named Adrian.

Summary from Iskultrip Scans: Story 1 (Phantom Lim): Lim and Iota live in a robot country. Lim, who is in love. Iota, whom she loves. The kind robotic maids. Lim has always thought her sunshine-filled days would go on forever, but... what is this promise Iota made with her in the past and the secret that he's keeping from her?

Satoko is a domestic girl with a kind heart. She lost her father when she was little, and her family has been very poor ever since her father's company shut down. However, life is happy enough when you are optimistic, and Satoko enjoys her daily life heartily. One day, she is rescued from a attacking dog by Fuuma, an extraordinarily mature 10-year-old boy. Little does Satoko realize that this boy is the head of Wakudera Corporation, as well as her future husband!

Volume 1 extra is Undying Flower (Karenai Hana), a yuri oneshot.

From Eclipse Scans and Evil Flowers:

Hyobi is a famous teen star on TV who lived her whole life as her mama’s doll. Suddenly, Hyobi’s mother decides to send her back to high school on a whim. Hyobi’s kinda lost in all this and she doesn’t have a single friend at school. Then she meets this girl name Soyule, an outcast of the class, and her childhood friend Chanbi. Now, Hyobi feels drawn to Soyule and Chanbi for they don’t know who Hyobi is outside the school…

From Chibi Manga:

Let's get into a time machine and return to that time.
Where it was always fun and you were always laughing, to that time...
"I only have three more months to live"
Yui who just transferred to a new school in the countryside becomes Ryo's classmate. Yui who is suffering from an illness has a "wish" that she can't tell anyone, but Ryo wants to grant her that wish but…
After death, reality hits Ryo and Yui.
This is the story of the eternal promise that was made by the two of them.

From Awakened Memories: The new school Lilia has just transferred to has a lot of people with suspicious abilities. There are vampires with fangs and the snow woman's son. And then it turns out that Lilia herself is a demon who sucks the life out of men by kissing them!?

From Midnight Scans:

The high-school second grader Nao secretly likes Rin, who is in the same basketball club. She didn't want to destroy the "friend" relation, and couldn't convey her feelings; but, one day, Rin falls in love at first sight?! Moreover, the person is a beautiful senior, Michiyo. And a junior, Kouta, is approaching Nao--?!

From GOoC:
Data is a kind of Magical Boy series manga by Tachibana Kaimu. The two main characters, Sakura and Yuki, are on quests to gather stones with magical powers. In doing so they are also hoping to uncover the mystery as to why they both seem to have lost their memory. A lot of new characters who are also "hosts" for the stones join in the fun as the story progresses.

From Yen Press:
Ten years ago, the mysterious Hell's Gate suddenly materialized in the middle of Tokyo, and the stars of the night sky were obscured in darkness. In their place, new stars emerged, each corresponding to an individual endowed with supernatural abilities. Devoid of emotion and conscience, these powerful killers have come to be known as Contractors.
But most people know nothing of the Contractors in their midst, and high-schooler Kana Shinoh is no exception. Still struggling to pick up the pieces after her father's death last year, Kana has never troubled herself with the rumors about Hell's Gate. That is, until she spots her father in the street one day. Determined to prove her father is still alive, Kana begins her search, but her mission is attracting some rather dangerous attention. Fortunately, she is rescued from the clutches of death by Hei, the most wanted Contractor in Tokyo. Though he is unsympathetic to her situation, Hei agrees to protect her as she searches for her father. But just how much should she trust the Contractor known as the Black Reaper?