From Seven Seas:
Sumire Takahana is a seemingly normal school girl cursed with the ability to see malevolent ghosts known as Viruses. Her life hits a crossroads after a run-in with a gothic lolita-clad monster killer for hire, Lucia Nahashia. Not content to stay on the sidelines while these Viruses prey on the weak, Sumire reluctantly decides to join forces with the mysterious, eye patch-wearing Lucia to hunt down these Viruses before they can hurt anyone else.

Based on the Vampire Savior installment, from the DarkStalkers video game series produced by CAPCOM.

In the world of makai, there are horrible monsters that humans fear, called Darkstalkers. Lillith, a fellow Darkstalker, falls to Earth (London) and befriends John. What will he do when he finds out what she is? Will Lillith survive Master Jedah's attacks??

From Boku-Tachi:
Humans are suited to be come a warrior of the Gods world. Once proven to be the holder of an honourable soul, a Goddess - The Warrior Virgin - will lead and show those the way into the Gods world, and yet dead, their souls will be given the opportunity to walk down the path of life. Necromancer, Lezard Valeth and his young apprentice Louie meet a "Hero" from a small town. Is he perhaps one of these honourable souls and what interest does Lezard have in him?

From Valkyrie Scanlations:

The princess of the kingdom of Dipan, Alicia, was abandoned by her parents when she was still a child. The rumour says that she was posessed by a Demon and therefore lost her life. But the truth reveals different. Alicia in truth, inherits the soul of the Battle Maiden Silmeria, one of the three Valkyries, what she has to hide from the rest of the world. That of course gives people reason to think she has a split personality. She is taken to a castle far away from her kingdom and hidden from the public and ever since living a quiet life. Until that one day when Odin, the lord of the gods, decides to come after the lost Valkyrie and forces her to return to Valhalla...

Jae-in is an irrepressible girl who aims to be a champion, and Tae-jin is the innocent boy who loves her.
This is the story of their challenges on the road to the championships, and an unlikely summer-time love.

In the Houkago Play Series:

V.1 -
4-koma about a high-school gamer and his bossy tsundere girlfriend.

V.2 -
About a gamer and his mangaka girlfriend.

V.3 -
About a boy and a girl who are both gamers, though they play with different styles.

V.4 - R

V.5 & 7 - High Heels

V.6 - Maniax

Vongola GP (Gran Prix) is spin-off series of Katekyo Hitman Reborn!, made by Takayama Toshinori. Manga introduces Tsunayoshi Sawada, called No-Good Tsuna who is descendant of world's legendary racer, Primo and his side-kick Gokudera Hayato. They battle on various members from the original Katekyo Hitman Reborn! plot.

Reincarnated to a werewolf magician, the Protagonist Vyett was instated as the vice head of the Demon Lord's third brigade force. Occupying a remote market town, he was entrusted to management and defense.

"As a former human, born a monster, I can understand the sentiments of both sides well enough. Because of that, those around seem to think I'm a man of wisdom, or something of the like, but it's really just one trouble after the next. I have to follow those monsters that are overly quick to resort to violence, and do something about the humans, who start to complain immediately. So today as well, I'll do my best at managing the Demon Lord's main force."

Official manga page

Model student Daisuke Mizuki has a secret swimsuit fetish. What will happen when he gets caught taking pictures of girls in swimsuits by his teacher!?

Kazuki's sister brings home a stray cat, who is actually a middle aged man in disguise.

Almost five hundred years from now, life on Earth struggles to survive in the aftermath of an apocalyptic war. Beasterians, scientifically created human/animal mutants designed to be strong, disposable soldiers, are now the masters of the remaining humans. Humanity’s one hope is the birth of a savior who will lead them out of the darkness. Before that time can come, however, three angels, all superb warriors, must fight to save the life of the Holy Mother.

Manga about Leonhardt's life within the Sora no Kiseki story.

From BH007: Xiao Yao is a good-for-nothing dreamer who would like nothing more than to own a celestial sword but was raised as a worker in a restaurant. One day he meets a mysterious drunken priest who asks for some wine...

Touya now has a new girlfriend, Yuki Morikawa--but before they enter college she is going to debut as an idol. How will this new development affect their relationship? What about the current idol, Rina Ogata, who seems to have set her sights on Touya?

Set in the near-future, a little-understood form of matter known as "Mile One" allows a powerful and influential Japanese family, the Gowa, to produce a bipedal weapon which they refer to as a Tactical Armor (TA). At this time, a war breaks out between the US and the fictional Middle East country of Belgistan, much like the Gulf War. When US military forces attempt to seize the capital, they are systematically wiped out by what appear to be rival TAs. The Gowa Family seizes this opportunity to demonstrate their weapon system, and civilian pilot Yuushiro Gowa and the military squad to which he is attached are deployed to Belgistan. There, he meets rival TA pilot Miharu, with whom he seems to share a deep spiritual bond.

NO TRAMA, NO DRAMA, JUST FIGHTING!The destiny of four man, one terrible fate. Who will survive!? Eiichiro, Kube, Noboru and Yoshihiro. PAINT BATTLE VOL 1: ABSOLUTE SHONEN.

[From Boku-Tach]i:

A compilation of five short stories by Ryu FUJISAKI written throughout his career. Ranging from fantasy to gothic horror, they explore the fantastic worlds contained within the mind of the mangaka of such series as Houshin Engi and Waq Waq.

This is volume 1 of FUJISAKI Ryu's Short Stories.

Volume 1: Worlds
Volume 2: Dramatic Irony

A libido-fueled art comedy featuring the secret art club activities of a delinquent girl and the boy who will make her his masterpiece.