Killy is a man of few words. He wanders, seemingly endlessly, through a lonely, gargantuan labyrinth of concrete and steel, fighting off cyborgs and other futuristic nightmares, searching only for something called Net Terminal Genes. And he has a very powerful gun, which he uses without hesitation whenever anything resembling danger rears its ugly head.
Who is this quiet, violent, determined man and what are these Genes he seeks? The small communities he finds tucked into the crevices of this towering, dystopic ruin hardly give him leads on his treasure, driving him to find larger enclaves of civilization where people can reveal more about the world he lives in and the quarry he seeks.

Blade Sangokushi side story focused on the reincarnations of Cao Cao, Xiahou Dun and the rest of Wei.

From Which Scanlations: Ever since Fune Momohara was told that she was just like a "guy friend" by the boy she liked, she's been bent on becoming the ideal girl. But when she meets the perfect guy who turns out to be more than a little pretentious, she realizes that it can be difficult to keep up appearances!

Dana is an archaelogist, who has discovered an artifact, which according to her confirms the presence of witches in this world. It also proves that 'witch hunts' were not all lies.

A story about two young demons who are always slacking off at work, a place that happens to be an organization that vows to keep the balance between the worlds of the living and dead by killing humans! Vol 1&2 contain a small short story about a robot with a mission to 'save humans'

From Chinatown KM:

Lu Jianye's son recently got hit by a car. The hospital fees are very, very costly and Lu Jianye had spent all his money. He goes back to the company he used to work for and demands his shares to be returned. He had thought his problems were over. He had thought everything would be okay. It wasn't that simple. Though life has a lot more in store for him!

In short, it's a story about money.

In the year 2032, Earth suffers from a sudden invasion by alien forces. Nineteen years passed after that event, and with chaos ruling the globe, the only way to rescue the world from utter destruction is to survive and fight against those who force Earth into complete annihilation. Black Rock Shooter (in the game a “living weapon” designated with the name BRS), is entrusted with the responsibility to protect mankind, possessing the abilities to fight against the invaders as the ultimate weapon. She emerges from the ruins of San Francisco, and witnesses an amassing of surviving troops which becomes her support throughout her mission.

The story follows a girl in the "Threshold" (??, Hazama), a world beween Heaven and Earth. "Impure souls" — those that could not ascend to Heaven with the burden of their own weight — have drifted to this world of constant warfare. Based on a music video with the same name "Black?Rock Shooter". Sung by Hatsune Miku

Being a hitman for the government is never easy. And then the girl you like turns out to be...!

From Blu:
Black Knight, the highest honor that can be bestowed upon a knight in the kingdom of Aran. Sieg O’Brian may have his eyes on the title of Black Knight but he’s also after another prize, the young prince, Chris. Black Knight is a sweeping romantic fantasy epic about the relationship between the prince of a medieval kingdom and his loyal guardsman. Our story begins when Chris and Sieg meet in military school and embark on a life-long relationship fraught with danger, treachery, and above all, love.

From Nekohana:
Rich young Master comes across a girl alone and abandoned during Christmas. He decides to take her in and name her "Mike". Now he's in high school and she's his personal maid. Did I mention she now loves him and he's rather sadistic with a terrible panty fetish?

From FORTE ATROX: Kang Yurhan is handsome, rich, a little dense, and above all else lucky! But that all changes when his father's company is forced into bankruptcy. Homeless and friendless, he doesn't have a choice but to sell himself to Miss Chunja, a famous fortune teller who seems to have some plans for the poor young man...

From Fushichou:

Around the time that Hinaki Mitsura climbed his way to number two host in the club, Tsukayama Satoshi transfers from a branch store. He was Mitsura’s senior in high school, and also the cause of Mitsura’s most devastating memory. Tsukayama proceeds to take over as top host, surpassing Mitsura and the man he has been living with, Miura-san. Miura-san is kind, gentle, and wants to protect and love Mitsura. But Mitsura’s heart is closed, that is until Tsukayama starts to work his way under Mitsura’s skin. His growing attraction to the arrogant one who caused a deep scar under the full moon is a source of confusion and suffering, and he begins to question everything he is - everything he has worked to become. This love story vividly depicts the human drama among hosts, under the blurry moon.

This dark and intense drama is set in a boy's high school where Kujo becomes the official leader of a gang. Kujo must constantly defend his position by playing a dangerous rooftop game with the other boys vying for his position. This manga has also been made into a film which has shown in various festivals throughout the world. Taiyo Matsumoto made his manga debut in 1986 in the anthology Afternoon, with the short story Straight. His credits include boxing serial Zero, the domestic drama Hanao, the sports manga Ping Pong, the beautiful and violent, Black and White, and the Moebius inspired, No. 5. Black and White and No. 5 were both published by VIZ and scanned by Jinchi who is loved by all US based manga publishers.

Almost two years have passed since Ryousuke made his wish to become a beautiful girl. Although he continuously and faithfully tended the plant that was supposed to make this seemingly impossible transformation a reality, the miracle has yet to happen! To what lengths will Ryousuke go in order to make Gunma fall in love with him? Is it possible that Gunma might actually return Ryousuke’s feelings…!?

Konatsu's dream is to become a movie director. She falls in love with a popular actor, Aoi Nonomiya, and decides to confess to him upon her friends' encouragement. But...

From Choutomaraseru:

An injured soldier on an alien world is rescued/captured by a soldier from the other side of the conflict.

The world’s largest luxury ship 'Blue Heaven' saves a wrecked ship out at sea. At the captain’s command, the ship is searched, and 2 male survivors are rescued. On the ship, there are signs of horrible bloodshed. One of the rescued men, of unknown nationality, loses himself among the ship’s passengers and starts randomly slaughtering the patrons and staff. What is his motive?!

From Taciturnity Scans:

Second-year middle school student Ayumu Kurihara changes classes and is seated next to the beautiful but strange Misuzu Tsukishima who dislikes boys. Misuzu can't get close to other people, but after being moved by Ayumu's sweet, honest personality she begins to open up to her little by little. Ayumu too is captivated by the awkwardly delicate Misuzu and the two of them become close.

V.3 (a.k.a. Second Season)
It's Shimizu Kanako's first day at an all-girls high school, and she's a little overwhelmed. Hoping to make new friends, she bumps into the odd and distant Kamei Ao, as well as her first three new friends: Aki, Rikako and Haruna. Of course, not all can be so sweet in the world of girls.

From Liquid Passion

Another take on the little mermai...merman?