A demon boy who lacks horns on his head wields the cursed blade "Onikirimaru", the one weapon that can slay a demon, in a never-ending battle with the demons that haunt Japan during the age of the samurai.
Behind the stories of Oda Nobunaga, Toyotomi Hidetsugu, Ishida Mitsunari, and the other famous generals of the Japanese civil wars lurk secrets and demons ...
An astonishingly deep story about these demons and the sword Onikirimaru!
And this also includes the secrets of Onikirimaru's birth, which readers have always wanted to know.
The legend of Onikirimaru explains clearly how Onikiri was born, and the hidden secrets of his past.
Behold the battle between the darkness of the age of the samurai and Onikirimaru!

The souls of the Hakkenshi are reincarnated in the present. Inuzuka Shino is a high school student who shares the name of the legendary Hakkenshi, "Devotion". The name has caused him nothing but stress all his life. Now, because of his name, he's gotten himself wrapped up in a conflict with the Blight, creatures from a giant hole that has suddenly emerged in the city.

Yuuki and Michi -- two childhood friends who drifted apart are reunited inside a mysterious train.

Demon summoner - what is this? And why?... These are the main questions Touya Douji is trying to answer. Just where should he be looking for them? Maybe, inside himself?

Do you want to understand the meaning of life? Do you really want to live?

The gate that leads the souls of the dead into the Underworld – that is called "Shisei Gokumon". There is a watchman at the front and the back of the gate. The black Gozu and the white Mezu. The only time they are able to meet is during the diminutive span of time when the gate is open.

"I want to touch the ox-headed demon dyed in darkness."

"I don’t want to stain the pure white horse-headed demon."

Two beings who can never be permitted to touch each other, despite their mutual affections. So close...yet so far. Those thoughts could only lead to... If they were human, perhaps this could be referred to as "love".

From The Zero Alliance:

At Seirei Academy, a series of mysterious demonic ceremonies have been taking place and the transfer student, Yuriya Yuuki is suspected by his classmates. One evening, from his dormitory window, Yuriya sees a girl wandering outside and follows her. Once outside, he encounters a book which allows him to summon the demon Belial, whom invites Yuriya to enter into a contract with him…

The pain Korean high school students have to go through... Going to school at 8am and coming home at 10pm...

A young lesbian couple ventures into a love hotel to perform an erotic ritual of black magic.

Zhong Kui, in traditional Chinese culture he was a god who was skilled at dispelling ghosts and other evils. He was born with a fierce and atrocious face. While he was quite ugly, he was also brilliant, outspoken, and tenacious. This story is not entirely based on tradition. It folows Zhong Kui through a fantasy world of ying and yang.

Nanri Ryusuke has transferred schools three times this year because of his parents’ divorce and he is determined to make a good impression at this new school because it appears that he's staying for good this time. However, his seat is in front of the weird girl in the class, Fujimori Miya, who claims she is a witch and who everyone in the school avoids. Miya, for some odd reason, takes a creepy interest in Ryusuke and makes him the subject of all her crazy experiments and spells.

The series is on hiatus since late 2012 due to the author's health issues.

The series contains 2 volumes;

1) Vartrag Tale
Ralph can see angels and demons. When he was five years old he came across the winged demon Valafar and was completely charmed by him. He made a pact with the demon in order to make his wish, to live with Valafar, come true. Seven years must pass, and there are two conditions that must be met for the pact to be fulfilled. Can the older Ralph discard his ties to humanity and fulfill the pact...?

2) Vartrag Tale - Korumajou no Shitsuji
The story of Valafar's ever-faithful butler, Belta.

Chiyo meets a wealthy nobleman who seems to be the grim reaper.
A story about being able to save people who are destined to die.

From CMX:

Madoka is a high school student who is recruited by Nabeshima ? the guy in the bunny suit ? to work for the GSG (Gokuraku So Gei, a transportation service to heaven). Nabeshima is just way too busy, and since Madoka seems to have the power to see lost souls, he's recruited to help lighten the workload. Madoka is given the job of transporting wandering souls to the afterlife ? on motorcycle! But many of the dead are reluctant to leave this world, feeling they haven't accomplished everything they should have in their lives. Madoka must assist the deceased in performing tasks that will help them finally feel closure and make them willing to leave everything behind for good.

Includes a side story called Sweet Medicine in vol. 4.

The "self bully" Ban has a normal enough life, and where divorced parents aren't that uncommon, her life becomes shadowed in mystery when her mother, Eun-Joo, suddenly brings their "distant relative" Jin-Whan home to live with them. Ban’s mother would always avoid the topic of her family, so who is this strange boy? Are they really relatives? What torturous secrets does her mother's past hold? And what do the sudden strange happens that follow in Jin-Whan's wake mean? Would a better question not be who is he, but what?

A veterinarian who can talk to animals? Even better that he uses his gift to educate pet owners.

Josh is a 15 years old Bully who have been expelled from his highschool for hitting a student who threatened another student. Thereby he was thrown out of the house by his mom. Now he's trying to get into a federal agency named The SCB.

From CPM:
The Devil's Castle was a dark and somber place, until the good-hearted apprentice ASARELLA stumbled on it in a goodwill mission, against her master's wishes--the archmage ELIWHO. Things sour quickly, as Asarella was bound with a blood pact to the Devil, KAINEN. Little did she know, the mage harbors a secret love for her that will only complicate her training for the upcoming apocalyptic battle. This sets up the most unusual love triangle of all space and time.

When Yuna Lee's mother moves to Germany to pursue a music degree, she's left to stay with her father, a university professor, and her three older brothers, who are fiercely overprotective of her.

During her summer vacation, she visits her mother in Germany, where she falls off a cliff and is rescued by Rieno, an 18-year-old knight living in the land of Phantasma. Rieno makes a deal with Yuna: If he saves her life, she must come with him and become the Queen of Phantasma.

After agreeing, she goes back home, only to return to Germany some months later, and is whisked away to Phantasma by Rieno. Now, she must cope with being the Queen of Phantasma, while forgetting the world she came from.

Did you think Masca: The Tale of the Great Mage of Hessed was over? Masca: the Kings is the sequel of Masca, in which Asarella goes on a journey to save Kainen. However, the first two volumes focus quite a bit on the development between Rea and Rakin (Kainen's beautiful ex(?) and another demon king).