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.

April 10th. Yesterday was the last day of spring vacation, so starting this morning it was a school day. After being woken up by his cute little sister, Itsuka Shidou believed that it would be the start of another normal day. As for predicting the chance meeting with the girl who called herself a spirit...... Along with a sudden shockwave, the townscape vanished without a trace. In a corner of the street which had now become a crater, the girl was there. "�”You, have you come to kill me too?" She is the disaster that will destroy humanity, a monster of unknown origin, and a being rejected by the world. There are only two ways to stop this girl: annihilation, and conversation. His little sister Kotori, wrapped in a military uniform, thus said to Shidou: "Since it's like this, just go date her, and make the spirit fall for you!" "Wh.. whaaaaaaaat!?" Enter a new age of boy meets girl!!

4-koma Based on a Novel - Date A Live.

Did you know there was an organization that is protecting the world from the harm? Its name is Ratatoskr.

Their job is to assist "Spirits", an unknown beings that causes destruction to wherever they go, whether they intend to or not. And they help those "spirits" adjust into normal life.

This is a story of a boy, Itsuka Shidoh, and his daily life, where he was forced into attempts into leading the spirits into his regular ordinary way of life and where they lead... his?

From MangaHelpers:
This manga is related to the "Date A Live" novel and anime. It features members of the AST (AntiSpirit Team), a special squad devoted to fighting spirits. Okamine Mikie idolizes her superior AST member, Tobiichi Origami, and may be in love with her as well. Unfortunately, Origami seems to want nothing to do with her. One day, they end up heading toward an explosion that wasn't caused by a spirit. Instead, it was caused by a girl named Ashley Sinclair, who transfers to their school shortly after the incident!

A seminal history of Date Masamune. Yokoyama has a plain and matter of fact style for history without really trying to dramatize it.

After a botched robbery attempt, a suicidal man kidnaps a high school girl and asks her to stay with him until he dies.

The 13th year of the Tenshou Era (1573.7.28 - 1592.12.8), young "One-Eyed Dragon" Date Masamune is the head of the powerful Date family. Masamune is very vain, self-centered, and reckless, and has started attacking and conquering all of the regions around his lands. The purpose of his campaign appears to be the acquisition of the treasures these nations possess. Katakura Kojuro, his trusted retainer and friend, does his best to keep Masamune from getting himself killed by his rash and dangerous plans.

Date Bashira is a series of stories about the Sengoku era in Japan. However, unlike most textbooks and historical mangas, Date Bashira does not focus on the Shogun or famous figures in history. Instead, it brings to light the untold stories of the things surrounding these famous figures. For example, one story tells about the role of how beautiful young men were always accompanying the shoguns into battle. As women were not allowed into a battle zone, the warlords would use these teenage boys to satisfy their sexual urges.

A different chapter tells the history of the wives of the Shoguns and focuses on the female role in the Sengoku era. As young women were forced into arranged marriages, usually as peace offerings or spies, their husbands usually die in battle at a very early age, as it was the era of war. Date Bashira discusses the idea of remarriage for these women and if they were really in love or were playing the role of a wife.

Date Bashira takes a different perspective at one of Japan’s most talked about era and even though it is informative, you never get the feeling of a lecture. The beautiful artwork, splash of comedy and the untold, yet interesting historical information really keeps the reader glued onto the pages. [vyc, mangahelpers]

From BLU comes an unearthly collection of stories illuminating the complex lives of immortal beings. An angel, who loses his place in Eden, finds a mysterious and dangerous new patron. A poor painter finishes a woman's portrait without a subject and reveals his forgotten past. These stories and more will delight fans of beautiful angels and demon boys!

From Dan of Population GO:

Three friends, Kotori, Yuuto, and Rin are trapped in school when the principal halfheartedly summons a horde of demons. The demons make a pact with each student in exchange for possessing them. Most of the students wished to be be good looking or to have longer legs, but Yuuto manages to stave off the possessed student body while Rin overpowers the weak demon possessing her. Yuuto makes a pact with a demon to return the school to normal, but what will happen to the school now that each student is being possessed by a demon?

From Midnight Scans:

Yui chased her boyfriend to a town and was rejected by him, and she became penniless. But the guy who saved her after being worn out is…?

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--?!

When I woke up in a hotel room that morning, I, Yoshiki, found myself before a naive coworker, a guy named Sunohara. Even if, at first, I was determined to cut ties with him after that single night, I remain strangely intrigued each time I pass him by at work...

From LuffyNoTomo:

In the modern day world, there is one who is born as the Maou (demon king) and one who is born as the Yuusha (hero). It's said that the hero is to defeat the demon king in both body and soul before the demon king tries to take over the world, but now a days who really believe in this stuff. Certainly not Mao who just so happens to be the reborn demon king. However, even though he has strange powers which makes other bad-guy type people fall for him, he has no intention of taking over the world.

One day the hero, Kamiko reaches Mao's office and notices right away that he is the demon king but in order to test this theory - he kisses him!
Mao just wants to get this defeat over with and go back to his daily life but when Kamiko seizes his company and says it's not going to be that easy. Mao's life is turned upside down and now they live together and Kamiko keeps insisting that the only way to be defeated properly is to have sex!

Moka's brother Megu is returning from New York City where he lived with their father. Not only that but she is also interested in the subject of art. When she goes to the library she meets Masato-kun, whom she begins to like. But Masato-kun turns out to be a playboy. Will Moka's determination win him over?

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!?

Mizuho was recently confessed to by the cheerful Hayami, but being the negative Mizuho, she is not convinced. Will Hayami's love change Mizhuo's mind?

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.