From Yen Press:

High King Madeth and his dear friend, the knight Lalvan…

By all appearances, the ties that bind the two men are made of the sternest stuff, but in truth their friendship has always struck a most delicate balance. With the arrival of Lady Prima and then her newborn son, Perseus, the precarious harmony between Madeth and Lalvan crumbles. And years later, when the young Perseus, harboring questions about his birth, seeks out Lalvan, will the repercussions be much greater than a friendship lost?

A lone angel, its eyes replete with sadness, watches the tragedy unfold…

Akabane Yuuhi, a 15-year-old girl who aspires to become an actress. Well, her dream might soon come true. She has been accepted into 'Diamond Actors Academy', a very prestigious school which trains young boys and girls to become actors. Many famous actors and actresses graduated from this school. So, of course, Yuuhi is excited. But, things start to get a bit weird. Just what is up with their teacher, Otome Kasumi? The acting is getting a tad too realistic to be considered acting. Things are getting really creepy. Is the school really what it seems? Or is there more to this school than meets the eye?

Viewed by some as a monstrous scourge and others as dark gods, the dragons are almost as ancient and powerful as Odin and the other Aesir, and for countless years have lived wild and free, unbowed and soaring across open skies. But things have changed. The dragons have been tricked and enslaved by the malevolent Loki and the traitorous Nidhogg, the Black Dragon. Now, their only hope for freedom rests with those few dragons who were able to avoid enslavement, one of whom was Iris. With ancient fire burning in her veins and hungry for vengeance, Iris has allied herself with the Einherjar so that she might gain the chance to burn Loki to ashes and free her captive brothers and sisters. Crystal Arena is a manga series based on the strategy game Crystal Arena, a story of the legendary Einherjar fighting alongside with the mighty gods in the ultimate battle of Ragnarok.

""Have we met?""Answer: a right hook Because Bryony Morgan pulls no punches. Even when she's very pregnant and facing down the father of her unborn child. She fell for wealthy hotelier Rafael de Luca when he courted her for her beachfront real estate. Then he disappeared. Now, she's in New York for answers--and she won't accept a brush-off.

Rin had quit calligraphy after her mother's death. Then upon seeing the calligraphy of a high school calligraphy masters, Uchida Dougen, she started learning again. Rin entered the same school as Dougen and the current calligraphy club or more like Dougen fan club. When the student council president announced that the club would be disbanded, Rin had to take action to keep the club going. Dougen, who had come to support the president, ended up joining the club because Rin's word sparked his interest. Unbeknownst to her, Dougen is somewhat of a playboy. What will become of Rin and her beloved Calligraphy club?

Hoshino is a timid grade school teacher. Sudou was one year his senior in high school. They meet again for the first time in over a decade and discover that Sudou's son is Hoshino's student. The two of them try to figure out how they feel about each other, and try to remember what it was that had brought them together and ultimately drove them apart in high school. They're both different, but that may not matter as much as how they still feel about each other.

He died, only for a minute. Minakawa Ryo was an ordinary high-school student until the day a girl jumped off a building, killing him with her. He miraculously comes back to life but with a new ability to see and hear what ordinary people cannot. Then one day a mysterious girl, Hokuto Shou, appears and tells him that his half has become a resident of the world of the dead. His previous ordinary life has dissipated, and a new life between the "living" and the "dead" begins.

Included is a special arc called A King and a Baron+.

From ShoujoMagic:

Altojin, a strong-willed warrior with a mysterious tattoo, was raised on the grassland plains of the country of Chigul in the time of Ghengis Khan. One day, while out hunting with the Imperial Prince Olsbolt, she saves his life from a would-be assassin.

Olsbolt, suspecting that the assassin was sent by Biruge Han, his father and the reigning sovereign of Chigul, kills his father and thereby takes back his former lover who had become his father's wife.

That night, Olsbolt goes to Altojin's home to hide, but while they were away for a moment, her entire family is slaughtered! What will become of the young warrior Altojin and the bold prince Olsbolt? And what mystery lies in Altojin's tattoo? Is it somehow connected to her family's assassination?

From DrCoke at MangaHelpers:

Even after one month of transferring to a new school, Natsuki keeps her distance from her classmates. Her childhood friend Haruka always tries to push her to be more sociable, but Natsuki just pushes her away. One day, while Natsuki was skipping class and eating lunch on the school balcony, a slime-like substance drops right on top of her. The slime slowly forms itself into... a human girl? An odd relationship between Natsuki and her new alien(?) sister Aoi begins.

From Chibi Manga:

She loved a teacher. But that kind of love is forbidden! Still she kept love him, and didn't care about it.

One day, she met a boy in white clothes in the greenhouse of the school. She saw his kind eyes and she smelled the odor of wood coming from him. For the first time, Tsugumi felt her heart beating for someone.

But after that encounter she understood that this guy was her teacher...!!

From MangaHelpers:
Himeji Wakaba is a 5th-year elementary school student, and she has the ability to see things that others can't. They are mostly frightening evil spirits, and they tend to do bad things to people who are close to her. As a result, Wakaba has no friends and rarely smiles. On a couple of occasions, she brings home stray animals, but her parents won't let her keep them. However, they're worried about their sad, creepy daughter, so one day they decide that whatever Wakaba brings home next, they'll let her keep.
The next thing she brings home is a pink monster called "Pupipo," but her parents stand by their decision and let her keep it. No one is quite sure what Pupipo is, but it protects Wakaba from the other things she sees. Pupipo also helps Wakaba make friends with an occult-obsessed transfer student and solve problems with bullying. Wakaba's life is a much better place with her pet pink monster!

1-2) Oboreru Hitomi
Aki is a male escort. He takes on customers from the shop. Miyaji-san is an ordinary salaryman who becomes Aki's client. He told him he thinks he might be gay because seems to be attracted to men lately. Aki suggests that they first start with a kiss, but ends up sleeping with him. He likes Miyaji, so he gives him his number. Then they meet outside the store...
Note: Chapters 2 and 3 were edited into one chapter in the tankoubon.

3) Saitei Kareshi
Tells the story of Aoi and his client Kaneko, an ordinary businessman.

4-6) Hearts
Tells the story of Shou and their manager Hayama.

7) Telephone
A sequel of all three couples.

Midway through the Twenty-first century, an integrated global computer network manages much of the world’s affairs. A proposed major software upgrade—an artificial intelligence—will give the system an unprecedented degree of independent decision-making power, but serious questions are raised in regard to how much control can safely be given to a non-human intelligence. In order to more fully assess the system, a new space-station habitat—a world in miniature—is developed for deployment of the fully operational system, named Spartacus. This mini-world can then be “attacked” in a series of escalating tests to assess the system’s responses and capabilities. If Spartacus gets out of hand, the system can be shut down and the station destroyed . . . unless Spartacus decides to take matters into its own hands and take the fight to Earth.

• Adapted from James P. Hogan’s classic science-fiction novel by the award-winning Yukinobu Hoshino, The Two Faces of Tomorrow is hardcore science-fiction manga at its best.

Can't find a way to break up with your boyfriend/girlfriend? These people will do it for you.

Kashiwagi has a special ability. When she touches someone, she can see their future romance. But Kashiwagi doesn't know anything about romance herself and can't determine whether the scenes she sees are happy or sad endings. Kashiwagi works at a cafe, known as the "break-up cafe", managed by Sano and in which Konno works as clerk.

There is a strange breed of mechanical creatures, aptly called “Machines,” who will, on the condition that their Host never love another person for as long as they live (else the debt will be paid in blood), grant their wielders fortune and prosperity. And where a Host has betrayed his Machine, you are sure to find a member of the mysterious Gari family, wielders and hunters of Machines, in the ensuing carnage…

So it was justifiable when the Gari family was dispatched to Shakunage High School to covertly investigate a brutal murder perpetrated by the spindly hands of a Machine… But it wasn’t so justifiable when Hanare Shizuma, a youth with an agenda of his own, enrolls at the High School soon thereafter, hell-bent on conducting his own investigation – and soon meets the head of the family of hunters, shockingly enough, a girl his own age. But little do either of them know that their encounter will set the cogs of fate spinning rapidly into motion…

The history is about a half japanese, half italian man in New York, who works as a contract killer for the mafia

Collection of short stories about married couples.

From Blue Flor:
House 1・ Somei Family
Despite being friends since childhood, there are many things that the husband does not understand about his wife.

House 2・ Kojima Family
A prince in a swimsuit creates a whirlwind romance, and happiness and various insecurities ensue.

House 3・ Takahashi Family
An orphaned exam student is flabbergasted at his older sister's pregnancy and even more so when he learns who the father is.

House 4・ Yano Family
A young widower reminices about his small wife, their relationship and married life.

House 5・ Shimaoka Family

House 6・ Fuyuki Family

Signs of Early Spring

From Chibi Manga:

Because she wanted to attend her grandmother's funeral, Miharu returned to her hometown. Over there, she met a strange boy. And then, she'll discover his true form...

From JShoujo Scans:

"I absolutely won't fall for this brat!"

Due to job transfers, Makoto has no choice but to stay at the home of her father's friend for the time being. But there lives a boy who makes her boiling mad!? Turns out he's the king of popularity at school, but he's a prankster who likes to mess with Makoto, and even recently dumped one of Makoto's good friends! How is Makoto supposed to handle this obnoxious brat!?

Nobody know where it is, but it's a place that offers shelter to those who hate their lives or are trapped in the labyrinth of their own hearts... a mysterious hotel. Even now, those who are tired of their lives come to stay in the "Kiri no Mori" Hotel...

In 2012, the author released another chapter, not yet included on a volume, as part of the 35th anniversary of Petit Comic.

In her Ay (Aniversary Box - 2013) the author wrote that this work is unfinished.