A tale of obsessive love and constant pursuit, told over a 1000 years.
Escaping from a brother who had just ascended the throne, Yoshitsune, along with his servant, comes across a house in the middle of a desolate mountain. Oddly enough, only a young woman lives there, who seems to possess a very dark and ominous past.
This long journey of more than a thousand years focuses on our main protagonist Kurou. It can be somewhat confusing at the beginning, but once you understand the plot this story can be quite entertaining.
The main thrust of the story goes like this: Kurou meets a beautiful woman by the name of Kuromitsu, and begins a relationship which transcends life and memory. Kurozuka tells the tale of a journey undertaken by immortals, and those who chase after immortality.
The majority of this story takes place many centuries in the future, after Kurou has been separated from Kuromitsu. Having lost almost all of his memories, Kurou seeks to understand why he cannot die, to rediscover his identity, and to find the woman that haunts his dreams.

It is the start of the 20th century and the Parisian commoners celebrating the Belle Époque are fascinated by the antics of the resident phantom thief Arsène Lupin. But the mask of Lupin actually belies a beautiful woman...? An epic adventure aboard a luxury liner and involving even Detective Holmes is about to unfold!

A young knight from a destitute noble family tries to live up to the code of chivalry.

The story centers around Keiichirou, a young man who lives alone in his house. He went through a lot of pain in his life, ever since an accident that happened three years ago.

One rainy day, he finds a little girl, drenched from the rain, inside his home. She is named Flower, and so begins the life for these two unlikely protagonists.

Nene, Hajime and Ryou have been friends from their childhood. Now in high school, they spend their days practicing for the school's marching band. But the club, lacking members, is about to close down.

And Nene, who wavers between sarcastic Hajime and brother-like Ryou, must decide between the two...

From Shinnen:

Tachibana Itsuka has always planned to live on her own once she became a high school student. On the day she's supposed to move into an apartment building, she finds it burnt and unfit for living. She's forced to live in the house of the landlady's son, along with two other women, and starting day one, none of them get along at all.

Includes oneshot;
Pure Heart Broken - To Rise to the House's Drama

On his first day of transferring to a new high school, a loner named Mori Buntarou, is cajoled by a classmate into climbing the school building. Despite knowing that one misstep could send him spiraling to his death, he moves forward, and upon finally reaching the top, Mori experiences a sense of fulfillment. That feeling, which seems to be telling him, "You're alive!" gives birth to an adrenaline for rock-climbing.

Note: Sakamoto Shinichi did both the story and the art from Volume 4 onwards.
The manga won an Excellence Prize in the manga division at the 2010 Japan Media Arts Festival. It also won Best Seinen Manga at the 2011 Prix Mangawa Awards.

from fictiondb:
She didn't intend to deceive him

When Philomena Peabody met her boss's son, he was suffering temporary snow blindness. "You sound like somebody's mother;" Penn Wilderman said, convinced by her no-nonsense attitude that she was "a sweet little old lady."

Even after she'd moved into his luxurious mansion to help look after his son, Phil couldn't disillusion Penn about her age.

To help win a custody battle for his teenage son, Phil agreed to marry Penn. But she dreaded facing him once the bandages were off, and he could see his attractive twenty-seven-year-old wife....

Deronga Five Alpha is a dying unstable planet which according to studies, used to be a very lush planet with all kinds of different species. The current state of the planet is a horrifying place where vicious carnivorous creatures fight in the “survival of the fittest.”

Captain Bagures, the leader of the research spacecraft, is a cold and cruel woman who, despite the warnings, unnecessarily sends a military team down to the planet for research. The end result was a catastrophe with the team being slaughtered by the creatures on the planet. The leader of the team, Cannon, vows vengeance on Bagures before seemingly dying.

Jump to 20 years later, a spaceship comes near Deronga Five Alpha to see the end of the planet. As the planet explodes, a foreign object attaches itself onto the spaceship. As nothing can survive a planetary explosion, the crew investigates the object only to find out it is one of the creatures from the planet Deronga. As the story progresses, the creature goes into a rage after seeing Bagures, now an extremely important person in the military, on the monitor screen. Could this creature be Cannon and how do you stop something that can withstand a planetary explosion?

From etc:

“Things that should not be touched by humans somehow find their way into this world. That’s why you should never, ever touch anything that is foreign.”
Follow the adventures of March, a Syste Behard, who hunts ils– evil creatures that lurk in fascinating objects.

Among the quiet villages and towns of 18th century Europe, demons known as the Ill hide within the most beautiful works of art, sparked to life by the torment of their creators. Attracted by their jewel-like allure, the unwary find themselves possessed by the Ill and driven to horrific acts of violence. Only the hunters of the Ciste Vihad can dispel the Ill.March is one such hunter, tracking the Ill from town to town to find the antiques that contain the demons before they can possess anyone. If the worst has come to pass, March's full powers are unleashed to battle the fiendish Ill. Born of tragedy, the artifacts all have their own tales to tell, as do each of their victims. But March's story may be the most tragic of all.

This is the story of a village where a deity is--on the day of the village festival, the deity endows a boy, Mao, with a destiny. That destiny is to live as a girl. In a small village where forests, lakes, fields, fish, insects, and flowers flourish, Mao, his sister, and his friend confront fate.

Takeru, who just graduated from middle school, learns that his father has suddenly remarried. While being happy for him, Takeru leads, what he believes to be a boring life. His only hobby is taking pictures of things he finds 'nice' with his cell phone. Upon entering high school, he is taking pictures of some cherry blossoms, when he sees a strange foreign girl and accidentally snaps a picture of her. And thus begins Takeru's interesting new high-school life.

Stories about Tezuka raising his three children.

Yonezo Yonekura is a young student, who is just starting to mature and notice his old childhood friend Tomoyo. Unfortunately for him, Tomoyo only likes intelligent people, and let’s just say Yonezo isn’t the brightest crayon in the box. One day when walking home, a strange old man warns Yonezo not to touch a demonic book that he will come across on his way home from school, but when Yonezo sees the book, he is too curious and picks it up anyways...

Doctor Mephisto is a man who is as skillful and handsome as he is mysterious and terrifying. He can cure any illness, heal fatal injuries, transform lead to gold, summon vicious monsters to do his bidding and perhaps even...revive the dead!?

Tired of being timid, school girl Marie wishes she was bolder and more social. To her surprise, two angels appear in front of her. They introduce themselves as Ryofu Housen and her second in command, Chinkyu Koudai. The angels are from Sangoku Heaven where thousands of angels train and engage in war so that they can become king and live lavishly.
Chinkyu is known throughout the Sangoku Heaven as one of the most brilliant tacticians and with the raw power of Ryofu, they make an amazing combo. The two must obtain crystals that appear when a good deed is done for humanity in Marie’s world. Marie gets dragged into their quest under the most ridiculous of premises.

Follow Eugene's "normal" everyday life. This comic is serialized in Gempak comic magazine from Malaysia.

Gyul, the outcast of the entire school, who used to be unable to get away from dangers without Ri Rang's help becomes strong with a sword obtained at an antique shop?!

Hot-tempered, unruly fighter Woo Ri and my best friend Gyul suddenly seems different? My heart beats when I see Gyul! Without knowing my eyes turned to look at his lips, and I could feel myself blushing. This is not a disease, is it?

Based on DS Dating Sim "Love Plus".

This series of stories started as just the oneshot Pure Love Strip, and then Doting Love Strip and Lavish Love Strip were released.

From ShoujoMagic:

Pure Love Strip
Yuuko is in her third year in Junior High (freshman in high school in US). She is a glasses wearing...four eyed nerd. She's suddenly getting tutoring from perfect Ryuunosuke-kun, but that is not the only thing that Yuuko is getting tutoring for...Yuuko's dangerous summer hoilday is about to begin!

Doting Love Strip
The continuing story after Pure Love Strip. After their first time.. he has started wanting it... every day!?

Lavish Love Strip
The continuing story after Pure Love Strip and Doting Love Strip. Perhaps the smuttiest installment so far? Yagami is tutoring Yuuko so that they can be in the same High School... But is his need for a wild sex life going to interfere with Yuuko's studies??