Kuroe, Yui

GoRA

In Shizume city there's a legend about a red king with demon-like abilities that single-handendly created the Homra organization, as long as you get accepted into Homra, you can gain extraordinary powers.

(Source: AQUA Scans)

K: Memory of Red

K-メモリー・オブ・レッド-

Konami, Shouko

Energetic and strong-willed, Beni doesn't care if she lives or dies as long as her death will result in embarrassing her arrogant father! But one day, she suddenly encounters a Kagetora, a ninja who's fallen from the sky and swears complete loyalty to her—as her bodyguard. Kagetora has time traveled from a long, long time ago, and has devoted his life to protecting Princess Beni. Little does Kagetora know that this Beni is not the real princess... Can true love and honor survive after centuries-long time warp—in a crazy modern world?

(Source: Tokyopop)

Shinobi Life

シノビライフ

Samura, Hiroaki

Manji is an infamous swordsman in feudal Japan who is known as the "Hundred Man Killer," as he has killed one hundred innocent men. However, there is something far more frightening than his ominous reputation: the fact that he is immortal. This is the handiwork of eight-hundred-year-old nun Yaobikuni, who placed bloodworms capable of healing almost any wound in Manji's body. 

To atone for his crimes, Manji resolves to kill one thousand evil men. Yaobikuni agrees to this proposal, saying that if he succeeds, she will undo his curse of immortality. Soon after this promise, Manji meets Rin Asano, a 16-year-old girl who requests Manji's assistance in killing those who slaughtered her parents.

Initially reluctant, Manji refuses Rin's desperate plea. However, owing to her evident lack of strength, Manji changes his mind and agrees to protect Rin for four years. With this partnership set in stone, the two embark on a perilous journey of bloodshed, vengeance, and redemption, each to fulfill their own life's cause.

[Written by MAL Rewrite]

Mugen no Juunin

Blade of the Immortal

無限の住人

Deng, Zhi Hui

Zheng, Jian He

Cheng, Kin Wo

The sequel and the continuation of Feng Shen Ji.

Feng Shen Ji II

封神紀Ⅱ

The sequel and the continuation of Feng Shen Ji II.

Feng Shen Ji III

封神纪III

A messenger of the Heavens has arrived in Zhao Ge, which has been ruled by the Shang dynasty for generations. The current emperor, Zi Zhou, refuses to bow his head before the gods and declares to the messenger that he will no longer accept the tyranny of the Heavens. The gods do not take this kindly; and soon, the emperor of a neighboring land, Wu Jifa, leads a crusade against the rebelling Shang.

During the battle, the Shang forces are vastly overwhelmed, and just when the capital is inches away from being taken, Zhou joins the fight. Although he breaks through the enemy ranks and makes his way toward Jifa, out of nowhere a god falls from the sky, landing right before him, prepared to personally deal with the troublemaker.

[Written by MAL Rewrite]

Feng Shen Ji

封神記

Kamatani, Yuuki

All Miharu Rokujou wishes for is a simple life.  Unfortunately, he soon learns that he is in possession of a sacred and secret ninja art, the "Shinra Banshou."  With this ability, Miharu is more likely to become the king of the hidden world, Nabari, than remain a normal high school student! He must also deal with daily attempts against his life and, ironically, his sensei's efforts to convince him to join the nindo club.

Having this "omnipotent" ability will test Miharu's chances of survival, and the world of Nabari is his only hope.

[Written by MAL Rewrite]

Nabari no Ou

隠の王

Yu, Wo

Ya Sha

Set in 2100 A.D., where video games feel 99% like real life. Follow Feng Lan in her adventure as the first player to play as the opposite sex in the VRMMO "Second Life" to prove to her brother that she can beat the game without using the "female benefits." But after she offends her family in a pvp match and even meets her real life friends and acquaintances in-game, can she continue to keep herself out of trouble by keeping her identity a secret?

½ Prince

½ 王子

Shinohara, Chie

A seemingly ordinary modern day teenager, Yuri, is suddenly whisked away to the Hittite empire in ancient Anatolia, where an ambitious queen wants the girl for a blood sacrifice in order to murder all heirs but her son, thus seizing control of the throne. Luckily, the timely intervention of Prince Kail saves Yuri from the queen's grasp. Kail promises to send Yuri back to her home, but the queen's persistent schemes to kill them both, plus their growing feelings for each other, keep those plans delayed.

(Source: Wikipedia)

Included one-shot:
Volume 28: Orontes Renka

Sora wa Akai Kawa no Hotori

Red River

天は赤い河のほとり

CLAMP

Six years ago, Kamui Shirou and siblings Fuuma and Kotori Monou were inseparable childhood friends. After the sudden, gruesome death of the Monou siblings' mother, Kamui was taken away from Tokyo by his own mother. In the years that passed, the two lived peacefully while Kamui strengthened his innate telekinetic abilities. When his mother passes away in 1999, her dying wish prompts him to return to Tokyo to face his "destiny."

When Kamui reappears in the city, his attitude has taken a drastic turn, and he displays the growth of his powers through violent confrontations in the streets. Various opponents come after him asking if he is "Kamui," but they seem to be demanding something far more significant than his name. These fighters represent two opposite factions—the Dragons of Heaven and the Dragons of Earth—who each wish to recruit him to their cause. Piecing together clues about the apocalyptic "promised day," Kamui realizes that he holds the fate of the world in his hands. Depending on which group of Dragons he allies himself with, he can either choose to save the world—or end it.

[Written by MAL Rewrite]

Kanno, Aya

The crown of England has been hotly contested throughout history, and in the Middle Ages, a series of great civil wars becomes known as the War of the Roses. Claiming a right to the throne, the Duke of York seeks to unseat King Henry VI and his heir in order to become king himself.

On a dark day filled with many ill omens, the Duke gains a son: Richard Plantagenet, third of his name. Neither male nor female, but instead possessing characteristics of both sexes, Richard III is immediately reviled by his mother. Her hatred defines his childhood, leading to a deep disgust toward his own body and an adverse reaction to being called a demon.

Richard grows up troubled by visions of England's former foe, Joan of Arc, who taunts that he will bring ruin to all who know him. He believes that he can attain salvation by helping his father achieve his destiny of becoming the king. However, cursed by the expectations of both his mother and Joan, will Richard's actions instead drag his family down into darkness?

[Written by MAL Rewrite]

Baraou no Souretsu

Requiem of the Rose King

薔薇王の葬列

Karakara, Kemuri

In the dawn of the Meiji period, the Gokumonjou, an inescapable prison, has been established in the middle of an enormous lake to counter the soaring crime rates the new era has brought. Serving as the ferrymen are the famous Kumou brothers: the eccentric family head, Tenka; the reckless but noble second son, Soramaru; and the guileless youngest, Chuutarou. In spite of their grim work, the three lead relatively peaceful lives in the ever-cloudy town of Oumi, together with their housekeeper, Shirasu Kinjou.

But buried in the long history of Oumi is the legend of the terrifying Orochi, a serpentine beast that awakens every three hundred years in a human vessel. Unbeknownst to Soramaru and Chuutarou, the actual job of the Kumou family is to seal the Orochi away before it fully revives—or the world will be plunged into destruction. Amid the monster's next resurrection, the Kumou family must find the resolve to keep laughing under the clouds.

[Written by MAL Rewrite]

Included one-shot:
Volume 1: Utakata ni Warau (2 parts)

12 Manga Like K: Countdown