Set years before the main story, this series follows Minori, Aki, and the other teachers during their days as students at Tenbi.

From Tokyopop:
Nightmares are bad enough when asleep, but In Dream World, nightmares are real, physical monsters!
Drake, Hanee, and Kyle fight these Nightmares with not only weapons, but "In Dream Cards". These cards have different elemental powers, and those who wield the cards are masters of their elements. Hanee and her friends must battle their way through the land of Nightmares to find their way home.

Maoyuu Maou Yuusha in 4-koma.

From Tenkyuugi:

In this world, there are 10 heavenly laws and 22 earthly laws. While humans cannot have knowledge of the heavenly laws used by the gods, they make use of the earthly laws. Through cards, each of the symbols can be utilized through the use of magic. Those with this ability are called magicians. Aspiring magicians study the laws in order to attend a magic institute. Nanao, Kisa, and Nanten of Nase are freshmen enrolled at the Seventh Eastern Magic Institute. Even within the 22 laws, there exist a rare ability. Nanao, who holds this ability, will...?

One day while playing videogames, a strange creature called Didi approaches Yu Yong Gi and claims he has a chance of becoming a Hero of 0.05%. And as such she has to aid him in becoming one. She starts showing him the evils of being a Hero, and after a while Yu Yong Gi realizes she is actually attempting to deter him from that path rather than aid him. With the cat out of the bag, she confesses she is a minion of the Dark Lord, meant to make sure he never wishes to become a Hero. Does the average Yu Yong Gi actually pose such a threat to the Devil Lords plans?

Mochizuki Mai always dreamed of a perfect boyfriend,
but finds difficulty because of her ‘unrealistic’ requirements.
She just can’t seem to find anyone on Earth who’s perfect! But what happens when someone out of the world shows up?
Someone from her cell phone to be exact! And what happens when this boy says “I like you!”? And what happens when Mai starts falling for him?!

They exist in the most unexpected places—be it within your eyes and ears, under the floor and roof of your house, or in the trees and flowers in your garden. They are everywhere, and yet nowhere, at the same time. Are they alive or not? Perhaps it is more apt to say they are beings who transcend the concept of life and death itself...

They are mushi.

Some wreak havoc in the lives of humans; others bring them deliverance from suffering. Mushi are neither good, nor evil: for just like any other creature, they are merely striving to survive in this harsh, competitive world.

Ginko, a lone wanderer with a reclusive personality, offers help and guidance to those plagued by mushi. This is the tale of his travels and exploits in a wondrous world populated by these mysterious entities.

Awards
- Excellence Prize for Manga at the 7th Japan Media Arts Festival (2003)
- Kodansha Manga Award - General Manga (2006)
- 9th place on Japan's Agency for Cultural Affairs List of Best Manga.
- The anime adaptation further won grand prizes in the categories of Television Series and Best Art Direction (for Takashi Waki) at the 5th Tokyo Anime Awards held at the Tokyo International Anime Fair in 2006.

From Friendship Scans:

The setting: China during the period of the Three Kingdoms!
The man: Hua Tuo, the great doctor who has alighted to earth, curing all illnesses, performing exorcisms and even exterminating all manner of monsters with ease...when no one else can!

But after every success, why is he dragged away from the celebratory feasts and beautiful women? And who would have the gall—not to mention the power over him—to send him off on an unending journey in (sort of) poverty and (relative) discomfort?

When grateful people try to press monetary payment (or women) upon him, he (well, his twin companions who step in and speak as one) refuses all, but asks them to always recite the prayer, “Namu Amidahba.”

What could the true goal of Hua Tuo be as he travels with the mysterious twins, the brother and sister Ri Yao and Yue Jing, who are constantly trying to keep him in check?

What great sin could he possibly have done to be forced to live a life so far beneath his merits?

A experimental manga series about a boy named Jun and his surreal voyages. The character is a alter-ego of Ishinomori himself.

Kai, who receives the "virtual-dream," a machine allowing one to dive into a virtual reality of multiple worlds and times, meets a man in the virtual world. This man introduces Kai to out-of-this-world sex within virtual reality. Unable to forget him, Kai dives again into the virtual world in search of him. Is this feeling lust? Or is it love?

From Yen Press:

In the year 2022, gamers rejoice as Sword Art Online - a VRMMORPG (Virtual Reality Massively Multiplayer Online Role Playing Game) like no other - opens its virtual doors, allowing players to take full advantage of the ultimate in gaming technology: NerveGear, a system that allows users to completely immerse themselves in the game world by manipulating their brain waves to create a wholly realistic gaming experience. But when the game goes live, the elation of the players quickly turns to horror as they discover that, for all its amazing features, SAO is missing one of the most basic functions of any MMORPG - a log-out button. Now trapped in the virtual world of Aincrad, their bodies held captive by NerveGear in the real world, users are issued a chilling ultimatum: conquer all one hundred floors of Aincrad to regain your freedom. But in the warped world of SAO, “game over” means certain death - both virtual and real…

Van is an alterative story set in a universe where painting is a form of power.

From Yen Press:

Each year, the Ushiromiya family gathers at the secluded mansion of its patriarch, the elderly Kinzo. It has been six years since Battler joined his cousins at the annual event, but their happy reunion is overshadowed by worsening weather and an eerie premonition from his youngest cousin. When their parents’ conversation turns to the division of the inheritance upon Kinzo’s imminent death, Battler and his cousins reminisce about the stories their parents teased them with as children-tales of the witch, Beatrice, who haunts the island’s forest. But when people start dying unnatural deaths, Battler can’t help but wonder…

Question Arc
1. Umineko When They Cry Episode 1: Legend of the Golden Witch
2. Umineko When They Cry Episode 2: Turn of the Golden Witch
3. Umineko When They Cry Episode 3: Banquet of the Golden Witch
4. Umineko When They Cry Episode 4: Alliance of the Golden Witch

Answer Arc
5. Umineko When They Cry Episode 5: End of the Golden Witch
6. Umineko When They Cry Episode 6: Dawn of the Golden Witch
7. Umineko When They Cry Episode 7: Requiem of the Golden Witch
8. Umineko When They Cry Episode 8: Twilight of the Golden Witch

The side story arcs are:
- Umineko Biyori
- [m]Umineko no Naku Utage ni: Tea Party of the Witches[/m]
- Umineko no Naku Koro ni Episode X
- Umineko no Naku Koro ni Tsubasa
- Ougon Musoukyoku
- Umineko no Naku Koro ni Shi: Forgery of the Purple Logic

From Fushichou:

Teio is the celestial son of King Soryuu (the Emperor of Thunder), whose mission is to hunt and kill demons in the human world. He works for and respects his father's will … until he meets the handsome and entrancingly-frail Keika, a beautiful demon with "faintly-colored violet skin, white hair, and violet eyes." For our young Lord Teio, it is love at first sight. Instead of killing his enemy, he decides to bring the beautiful evil up to heaven with him. What will happen between the childish celestial and the bewitching demon?

Set in a mythological time and place, Ja-Dou recounts the struggles of the heirs to kingdoms of heaven and their comrades, to repel the demonic forces that sometimes make their way into heaven.

Ashray is the son of the Flame Emperor, small for his age, and cursed with a fiery temper. He also has to hide the fact that he has a horn, a trait usually associated with demons. His father keeps appointing assistants to keep an eye on him, but keeping up with Ashray is hard work, and the first six have died in the line of duty. Can Alan Seoul, his newly appointed seventh assistant, last a little longer than the first six? Teiou is a prince of the eastern kingdom of air. His best friend and lover is Keika, a mazoku, or demon, in human form. Tiarandear, is the Prince of the western kingdom of water. As chief of all the gods it is his job to maintain harmony in heaven and to direct and control human history. He loves Ashray, but how long can he keep protecting Ashray from the consequences of his violent temper? And if it should become known across heaven that Ashray might be part demon?

A collection of short stories:

1) Vahlia no Hanamuko
Jiru and Vahlia were engaged. But Jiru suddenly went missing! Four years later, Vahlia was betrothed to his younger brother. During the night of the celebration of her second engagement, Vahlia decides to go on a journey… in search of Jiru!

2) Ryuu no Moriuta
The dragon child Kito and the priestess Shuen await the day Kito becomes the Heavenly Dragon.

3) Ginsekai no Shoumei
Alza lives alone on a desolate snowy plain. One day, Leah, a sorcerer from the magical city collapses near his house. Alza forbids Leah from using magic in his presence and shows her how beautiful life can be outside of the magical world. But, why does Alza hate magic, how did Leah get outside the magical city, and what will happen when Leah returns home?

4) Otogibanashi no Fude
At a far away village, there’s a sacred tree where the Water God dwells. It’s Sasara Yuukei’s task to trace the fading letters of the contract between the Water God and the people of the village. One day, while carrying out his task, he suddenly met the Water God herself! And gradually, he found out that what he’s been doing every day is actually...

From CoyoMoose:

Amushasu, of the Alaturca Alagun performing troupe, believes in magic created by talent and hard work to reach the hearts of his audience. He does not have any respect for the magic of genies, though he does happen to own a very dissatisfied one named Mayu. His faith in his ability to sway a crowd is threatened, however, when he comes across a beautiful young lady whose heart appears to be untouchable.

From Yen Press:

Kazuto Kirigaya (aka Kirito) has survived the death game of Aincrad masterminded by Akihiko Kayaba, programmer of Sword Art Online, and made it back to the real world. Unfortunately, the same cannot be said for Asuna Yuuki (aka Asuna the Flash), the girl Kirito fell in love with in the game world and who has yet to awaken from her seemingly endless slumber. As his sister, Suguha, sadly looks on, Kazuto continues to visit Asuna in the hospital in the hope of finding answers... But one day, the answers suddenly find him in the form of a man who claims to be Asuna's fiancé?! With him, the man brings an in-game screenshot of someone who looks a lot like Asuna being held captive! Now Kirito must dive into an all-new VRMMORPG, ALfheim Online, to bring Asuna home!!

1. Haikyo Shoujo (Ruin Girls)
Two years ago, Kazeko was trapped in a factory, where all she was able to remember was that a man kidnapped her. As for her friend Yuri, they seems to be more to her than meets the eye... As they both went back to the factory, Kazeko's memory resurfaces...

2. Ongaku ga Mieru Otoko (The Man Who Can See Music)
A music teacher can see music every time someone plays their instrument. It all started with a certain young man that gave him them hallucinations, however, that same young man may be a path to his salvation.

3. Tansu Shoujo (Chest of Drawers Girl)
A girl came to him, thinking he was her doctor. In order to investigate why his twin brother, the doctor died, he plays along with her. Entering her world blue sky world, he had opened his heart to her. But he isn't the one she loves...

4. Boushi no Ue no Oka (The Hill Above the Hat)
A renowned hatter makes hats for the rich for easy money. Getting a request to make a hat for the king, he sets of with his eccentric apprentice. On the way they crashed and entered the ruins for shelter. However, instead they can't get out of the ruins and in order to exit, he must make hats for the ghost. Can he makes hats that would satisfy the ghost?