From Awakened Memories & Fate

1-3) Love Knife
Afraid of being alienated, Asahi doesn’t say what she really thinks. Sou, who is always true to himself, has Asahi’s admiration. She is about to go to a love hotel with her boyfriend that she doesn’t even like, Youhei, and gets saved by Sou… The admiration for Sou starts turning into love. Even if she turns everyone around her into an enemy, she chooses Sou but…!?

4) Antique Girl

5) Teatime Is At Midnight

Chris is a tomboy whose relatives send her away to a boarding school after her father dies. As she grows up in Victorian England, Chris must decide whether to give in to what society expects of her, or to challenge it and follow her own dreams.

From MangaHelpers:
Multiple instances of mysterious mass deaths are erupting all over the city. The only similarity between each mass death is the time in which the victims were found dead. Trainee doctor Sasaki finds himself in the midst of one of these mass death events. He must now fight his way out of a dungeon ruled by a man-eating monster: "Hitokui." As other humans are slaughtered and eaten alive around him, will he be able to escape out of this dungeon and bring an end to these mass murders?

Suzuka got a tarot card reading from her friend Miyabi that she will meet her love. Could that be Konno, the guy in class D who confessed to her a year ago when they were in the same homeroom class? But before Suzuka could realize her feelings, Konno...?!

From Chuu Chuu Train:

My class’s boys made some sort of group called O.P.D. (Mew Mew Group) and that stupid idiot “Shou”. Why do I always care about him? Why does he make my heart beat so fast? This sort of emotion is definitely not friendship… probably very special… Then that means I like–?!

From Aerandria Scans:

Kanako is an unattractive and not very capable office lady, until the day her mother passes away and she turns out to be the sole heiress of the old and elite Kinaga house. So suddenly, Kanako has not only to uphold her duties as an heiress, but to turn into an attractive lady so that she can marry accordingly to her new status. Thanks to the family butler and her own efforts, she manages somehow, but even in the middle of her newfound glamor, her world still continues to revolve around her butler...

From Tokyopop: It's senior year, and Rica is seriously stressed out. She's got more homework, exams, and papers than she can handle, and was recently dumped by her boyfriend. In other words: Life sucks! One day, she's chatting online when she meets three classmates who hate school as much as she does. Together, they hatch a plan to blow up the school when no one is present. The countdown is on for X-Day ... Featured in this manga is a side story called The Last Supper.

The card reads as follows:
Congratulations! You are one of the 1 in 100,000 people who has been entered in the amazing LIAR GAME TOURNAMENT!

Along with the postcard there is 100 million yen in notes. That's the beginning of the Liar Game. When the game ends, in 30 days, you will have to return your 100 million. If your opponent steals them, he can keep them as a prize, and you will have a debt of 100 million...

Shinaka Itachi has a perfect body that seems to allure males everyday. He is tired of being harassed everywhere, so he desperately tries to be unobtrusive - but his efforts are futile. One day his classmate Jin notices and offers protection in exchange for his body.

Yurino's beloved is in financial trouble, so she decides to help him out by being a prostitute. However, the first guy she says "wanna have some fun with me for 500 bucks?" to happens to be a famous popular music composer, Yukio, with one of his singers, Karin, with him. The book consists of a collection of dangerous and sad love stories.

From ShoujoMagic: Story 1: The Indigo-Blue Queen ~The Stage Actress Murder Case~ Riko adores the talented stage actress Katzuki Ichie, who is best known for her performance as "The Indigo-blue Queen," a noble woman who is poisoned. However, Ichie is worth more to some people dead than alive, and she's been receiving anonymous death threats. When the curtain falls on the final show of "The Indigo-blue Queen," Ichie dies as the cryptic threats foretold, and everyone -- including Riko -- is suspect...!? Story 2: Private Room Shouko and Aiko Kuramochi are sisters who live alone with their father. Their father gets hospitalized and falls in love with a beautiful doctor... Afterwards the doctor moves in with her beautiful son... Inspite of his beauty Yuki is cold and without emotion...

After hearing about the rejection of her friend Mika, high-school girl Kiritani Mutsuko attempts to extract a proper reason for the rejection from Mika's object of affection, Narita Akito. After all, although Narita is popular, Kiritani just dosen't understand why so many girls would fall in love with him. So in order to understand him better, Kiritani starts to walk home with Narita on a daily basis, and they slowly begin to grow closer.

But Narita has problems of his own, including a heavily depressed mother he must deal with on a daily basis. His own experiences at home leave him unable to relate to the girls whom he frequently rejects.

After learning of this, however, Kiritani makes him a promise. That she would never, ever cry in front of him.

From Aerandria Scans:
Arima and his little sister Chihiro are the twins of the Momoyama family. Six years ago, they've overheard their parents say "We will tell them the truth when they turn 16." The two worried that they might be adopted during those six years, but the truth they learn on their 16th birthday is even more shocking! Also includes an award-winning one-shot.

Due to changing schools constantly, Hime has been unable to make any friends. Now, at a brand new school, Hime sets out to celebrate her youth and live a dream high school life.

Tachibana Ritsuka is a female second-year high school student who attends Shiko Academy in Shiko Town. She enjoys her school life while living with her mother Maria, but one day, that balance falls into ruin when she discovers several of her attractive male classmate are demons.

From Chibi Manga:

The often-ill and unskilled-in-love Akane Is teaching a demon-like boy about love!?

Takato Kei is just an ordinary college student, training for an ordinary life, when he falls onto a strange but appealing part time job. He's been hired to tutor a teenage girl at home for 10,000 yen per hour! The girl in question, Fujioka Yukari, is not a high school student, but a highly successful day trader who has already amassed 170 billion yen! Despite her money and her beautiful apartment, Kei can't help feeling that there's a certain loneliness about the cute teenage girl. She even seems embarrassed of her career, as if her obsession with the stock market and the vast amount of time she spends moving stocks makes her an otaku. Kei may be just the person she needs to help her break out of her isolated lifestyle and acquire the one thing money can't buy - happiness.

(*Although the main story as been fully scanlated, the Extras from the tankobon are still unscanlated.)

After the surface of the world succumbed to chaos centuries ago, the city of Novus Aether is kept afloat in the sky solely by the continual prayers offered by the Saint. Years ago, when the Saint’s prayer was interrupted, an incident known as the "Gran Forte" occurred, causing a portion of the land to fall and split the lower city into two, separated by a cliff. Countless lives and property were lost or irreversibly affected in what would be known as the greatest disaster in the city’s history.
In time, the lowest layer, known as the "Prison", became the home to people who lost much of their former lives during the "Gran Forte". Crime, famine, and disease run rampant, with "The Noncorroding Gold Chains", the ruling organization in the area specializing in the sex trade, keeping what little order that still exists. Meanwhile, a contagious disease which causes the infected to grow wings has spread throughout the city, and a unit commonly known as the "Wing Hunters" has been formed to deal with these people swiftly and often violently.
In this "Prison" resides Caim Astraea, a freelance ex-assassin who does odd jobs for his friend, the head of “The Noncorroding Gold Chains”, for money. During one request, Caim finds Eustia, a winged girl who emits the pale purple light characteristic of the "Gran Forte" incident years ago. His encounter with Eustia will take him on a journey which will involve him with the most influential bodies of the city, including the Church and the royal government. As he searches for the meaning to his cruel, difficult life, he will discover the deepest and darkest secrets of Novus Aether.

A Collection of early stories:

From Covenant of Darkness:

Face, body, and talent, all 3 are what conspires Misako’s love for the star of the basketball club, with a genius ability and super beautiful Urasawa-kun. However, Misako's first and last profession of love in her lifetime was drastically discarded. Strangely, Urusawa-kun decided to model nudely for an art exhibition in hopes to winning a prize because he has an eye for that thing. The lingering affection is banned and the conditions that sends Misako's heart to abide… A romantic comedy treasure?!

From MangaHelpers:
Since their mother's death, sisters Tomoe and Mikage have been mostly raising each other. The older sister, Tomoe, is determined to get good grades and work her way into a good college. However, she's disturbed by the trouble Mikage sometimes gives her. For instance, at the beginning of the manga, Mikage sneakily locks a collar around her older sister's neck, forcing her to go through the day wearing it. Mikage wants Tomoe to think only of her, and her affection may be beyond sisterly love. However, at school, Mikage has made a new female 'friend' that has a serious crush on her. The two sisters have their separate lives at their respective schools, but their life together and their relationship may be most important of all.