Every 30 years, a new princess is chosen from the Hime family to serve the Hayagami. The time has come again, but over these past years, records state not a single female has been born, save for one, the 15-year-old Arata. The only problem is, Arata is actually a male! Forced to disguise himself and take the place of the princess candidate until a formal one can be found, he attends the festival only to witness the current princess, Kokuri-hime, murdered, and his own life is forfeit as well, by the hands of the princess' personal guard, the 12 Shinshou. As he runs for his life, Kannagi of the 12 convinces everyone that Arata is the one who has murdered the princess instead, and now everyone in the Imperial Court is after his head! Now, another Arata from our world has crossed over in Arata's place! How did this happen, and how will these two survive?

The story centers around twin brothers, Arago and Ewan, whose parents were slaughtered by monsters. Years later, the vengeful Arago crosses paths with Ewan, who has since become a police officer, just as blood begins to flow again in the streets of London.

A mysterious disease is spreading amongst the reyvateils, causing them to go berserk. The key to stopping them lies in the hands of Espada Reid. The only problem is: he hates reyvateils. Will he be able to overcome his feelings and stop the reveris illness?

Tastumi is a normal boy going to school and living with his strict older brother. Orphaned at a young age, his brother has been both a mother and a father to him. One day, he and his friends are about to rescue a beautiful girl from being harrassed when she beats them up herself. When she sees Tatsumi, she suddenly calls him "Rui". What does this mean? Who is the girl? Why are there strange men attacking him all of a sudden? And why is his brother suddenly so different??

An order has been sent out to hunt down the existence of an Asklepios, a Greek demon god of medicine, whom the Church believes is practising unorthodox methods. A member of armed force group assigned to this mission by the name of Luca encounters two kids who saved him from an injury he faced during a brawl. Who are these kids and can they help out Luca with his personal reason for doing this assignment? One-shot turned series in September 2008.

From http://www.niko-niko.net/sites.html: Ashita no Nadja is the story of a young girl who grew up in an orphanage in England. One day she learns she may not be an orphan after all, and suddenly finds herself chased by some strange men. She ends up fleeing the orphanage and joins a travelling troupe of entertainers. The show follows her travels across Europe as she tries to find her mother and figure out who she really is. A bit more info about the manga is at http://www.niko-niko.net/nadja/ under 'Extras', and info about the anime series and merchandise.

Frederica, the older sister. She contracts a demon, hunts the souls of the wicked, and sends them to hell. She is the silver seal. Howly, the younger brother. He was given his life by a demon, according to his sister's wish. He serves and protects the silver seal. He is the warrior seal. What will the world give to them?

Battling incredible odds and critical public opinion, a trio of astronauts fight to disengage a runaway generator in impossible conditions and silence longtime critics at the same time

From Storm in Heaven and one of their legacy groups, Bamboo Feathers:

Fraw and Kio are angels, and it's their duty to protect the passage of souls to Heaven. When the two were growing up, Kio always looked after Fraw. However, their roles are suddenly reversed when Fraw is promoted to one of the highest ranking classes of angel, and Fraw takes it upon himself to protect Kio.

Can Fraw keep his new position a secret while he and Kio battle against the Manifis, evil spirits that feed on humanity? And what is so unusual about Kio and his wings...?

Originally a oneshot called "Eden."

When Lord Dahn-Guh "accidentally" unleashes powerful demons unto the land, he orders the fool Ondal to recapture them! Unable to fulfill the task on his own, Ondal is accompanied by Hae-Moh-Soo--a legendary, foul-mouthed warrior who helped to trap the demons in the first place--and...David Copperfield?! Along the way, they come across quite the interesting array of characters: a gang of armed nuns, the mysterious Samson with singing powers, the twins Pai and Pei, and so many more!

From Tokyopop:
An ancient seal has been broken, sending a flood of demons into the mortal realm. Hizuru Oborozuki and Takuya Hijou, descendants of the great savior who banished the demons in the past, must fight the evil spirits using their mystical powers. In order to give the world a fighting chance, Takuya uses his music to transform Hizuru into a beautiful warrior. Some things are worth fighting for, but is the Earth one of them?

From Tokyopop: After the abduction of his brother Kotaro by the Machine Empire, Teppei Takamiya joins forces with X, one of several highly-advanced, artificially intelligent machines known as B'ts (pronounced 'beat'), to rescue him.

From here:
Sunao always thought she'd fall in love when she started junior high school. But there aren't any attractive boys at school. Still Sunao doesn't give up and meets two handsome upperclassmen. The kind and sensitive Toru and the cheerful and friendly Kaoru are members of the school Magic Club, which Sunao also joins. Then she finds out that Toru and Kaoru are actually thieves known as "B-apostrophe" who need Sunao's help as a master of the martial art Shinbu-ryu. They are trying to find the treasures hidden by the illustrious thief from the Taisho Era.

According to the legend, whoever finds seven glass balls and solves the seven secrets, hidden in each, will win treasures worth 30 billion yen and learn a strange magic secret. Sunao is surprised by this and becomes part of the team because she is attracted to the boys. It's like being in heaven surrounded by two such beauties.
But they are not the only ones after the treasures. Somebody called "B" always gets in their way. "B-apostrophe" might know who "B" is... Sunao is swayed by her complex feelings: She likes Toru, but occasionally feels a pull towards Kaoru and even to "B" when he makes contact with her!

Leto is employed as an apprentice by the skilled mercenary Alpha, from the mercenary unit Boreas. He struggles to rid himself of his apprentice status and be accepted by Alpha. However, as a mercenary, many painful encounters and terrible experiences await him…

A series of fairytale-like stories, loosely connected by the ongoing adventures of the enigmatic Hwa Ryungang, a man with strange powers and a connection to the spirit world, and Moohwe, an irrepressible wanderer with a mysterious past.

After being bullied at his old school, Makoto wants to be the main character of his own story. When he finds a bill with his face on it on a school trip to Kyoto, he takes it as a sign, which leads him to fall into a river. Once he comes to, he realizes that he has been transported back to the period of time in Japan known as the Bakumatsu!

Kazuki's had a 16 year grace-period of peace and relative normalcy; smuggled to Japan and raised by a kindly old woman he's grown up to be a bright and friendly boy. His childhood friendship to the girl next door is just beginning to blossom into romance and the death of his ward leaves him with enough character-building angst to set him up for just about any cliche shoujo adventure Yukari Ito has in mind. Unfortunately, Yukari Ito is TOTALLY insane and has decided to make him a vampiric kitten engaged from birth to a Nightmare. (from doki-doki)

"Basara - The spirit of freedom which denies old authority, transcending traditions and customs."

Born under a prophecy that will liberate and unite Japan, Sarasa has had to take her brother Tatara's place as the "Boy of Destiny." Fighting for the oppressed, Sarasa journeys across Japan to gain allies and defeat her enemies--all while keeping her identity a secret!

Basara won the Shogakukan Manga Award for shoujo in 1992.

Futaba, a boy that has grown up in an overprotected family, suddenly finds himself on the other side of the world, where he meets Kiara, the Amaranthine. They journey to find Kiara's true master, and along the way they meet a curious cast of characters, including the wizard Belbel and the prince Virid.