From Snow Kiss Scanlations:

Towa became a sweeper admiring the legendary sweeper called, “Orange-Eyed Messiah”. The task of sweeper, which requires to “sweep” the monsters Adys is quite hazardous. On his first real attempt at fighting Adys, Towa encountered Kei, a former sweeper who saved him from being killed.
Towa asked Kei to take him as a student. However, not only Kei plainly rejects Towa’s request, he tells Towa that he saw the “Orange-eyed Messiah” die!? An appearance by a mysterious man who seems to be connected to Kei showed up with a grudge from the past. Who is he and what is his relationship with the “Orange-Eyed Messiah”? Will Towa finds out about Kei’s past too?

Spin-Off of CRIMSONS - Akai Koukaishatachi

From Yen Press:

Rescued from the darkness by Xeno, a mysterious swordsman, Claudia the Rose Witch is the foundation of the Crimson-Shell, a special division of the Red Rose—an organization aiming to capture the results of one mad scientist’s experiments, the deadly Black Roses. But when Xeno’s loyalties are called into question, will Claudia be strong enough to believe in her dearest friend? And what is the color of the rose blooming in Xeno’s heart—a deep, passionate crimson…or a traitorous jet-black?

From Manga-Heaven:
Long ago, a devil traversed the world leaving nothing but death in his wake. Eventually the demon was slain by the 10 gods who created the world. As the people began to worship the gods, the gods created 10 swords infused with their power to protect the world from evil and peace dawned upon the world once more...
Mirim is a member of the 10 Pillars Sword Guild and one of its elite earning the title of Crimson and the right to wield one of the swords forged by the Gods. Her companion, Ash Grave, is the devil of legend. Why is a swordswoman with divine power to protect the world paired with the demon that is said to be destroying it? Perhaps there is more to this legend than meets the eye...

From Seven Seas:

From the time she was sold into servitude as a young girl and told by a handsome demonic figure that she had a destiny to fulfill, Sheila’s childhood was anything but easy. After joining an assassin’s guild to undergo rigorous training, Sheila is later taken in by the dashing Prince Edvard to serve as both his housemaid and bodyguard. As skillful as she is with a blade, Sheila hasn’t a clue when it comes to courtly romance. While she uses her talents to help Edvard win the throne, can she stave off the many admirers who vie for her heart?

Carl van Hellsing has vowed to hunt down the vampire Elliot for eternity. But, that's exactly what Elliot wants. Implicit shounen-ai.

From Bliss:
In this universe, there are four worlds: Meikai, the center of the universe, Ninkai, the human world, Youkai, where monsters with shape-shifting forms live, and Shintenkai, the world of the Celestials. Shiba Yukinari is one of the few who are born of both Youkai and Celestial blood - during the day, he works as a detective, but also has the job of exterminating youkai. As he works collecting 'cores', or a youkai's source of power, he meets Riifei who that demands that Yukinari hand over his own 'core'...

Vol.1 Crimson
Vol.2 Crimson Crown
Vol.3 Crimson Chaos

The people of Earth live in a society where vampires aren’t just real but dangerous. Although humanity has been able to keep them under control and even take the night away as the vampire’s natural habitat, some of them have adapted. Hesperides, a relatively new breed of vampires, have adapted over hundreds of years in order to be able to go outside during dusk when the sunlight is at its weakest and feast on humans. Aburaya Shiro, a high school kid, lives in a town where there has not been a vampire attack in years, but adults keep warning them of going outside at dusk. Shiro and his classmates take this warning lightly and head out at dusk only to find out one of their classmates who they thought they knew well turnz out to be a Hesperides. With all his classmates violently murdered, the only way Shiro was able to survive was with the help of a different classmate, Ichijoji Eruka, who doesn’t seem to be human herself.

From Aerandria Scans:

Mikoto, a high school student who lives alone in an old apartment, and Murakami-san, a university student who lives in the next room, are a couple. She should expect every day to be lovey-dovey with her boyfriend, yet troubles after troubles keep on happening?!

From Aerandria Scans:

1) Cream Caramel Chocolate
Actually, Mikoto, a high school student who lives alone in an old apartment, just started dating Murakami-san, a university student who lives in the next room. Living under one roof, she's happy that she can be lovey-dovey every day with her boyfriend, but reality is somewhat different...

2) Springtime Do Re Mi

3) A Happy Heart
Fukuzawa Makoto is the chairman of the discipline committee. Shiba Emi has a super big crush on him so she attempts to get his attention by breaking the school dress code.

4) To Pursuit Happiness

From Sensation Scans:

Seo Kyoung is pitiful. Everyone thinks she is, especially after making the wrong "friends," she now has to prove that she does have a boyfriend. She accidentally chooses the most popular guy in school... And... he starts to like her. But his best friend likes her too. What will happen?

A collection of oneshots:

1) ABC
Aki is in her first relationship with Yousuke, but he doesn't seem like such a great guy...

2) Nako's Love Letter
Suki's boyfriend, Tooya, is scary looking and always treats her like his servant. How does he really feel?

3) Snow Upon You, Flowers On My Heart
Yu has been asked to take care of his cousin, Sakura, who hasn't talked since she witnessed a car accident 4 years ago.

From Tokyopop: Jin Sung Moo does his best to hide his inner feelings; Shin Hae Jung dances to the beat of her own drum; and Jimmy is an out-of-this-world guy with a revved-up motorcycle and style that is second to none. Some say it's an extreme kind of love. Some say it's just crazy. Some say it's a crazy love story.

Daisuke Niwa is an ordinary, if slightly unlucky, middle school student. On his fourteenth birthday, he comes down with a 'condition' that has plagued the men in his family for three hundred years. When he sees his crush, Risa, he transforms into his alter ego, the phantom thief Dark. Unfortunately, when Dark sees his crush, Risa's twin Riku, he transforms back into Daisuke. The only cure for this craziness is if Daisuke can get Risa to fall in love with him and Dark can get Riku to fall in love with him. But that's going to be a problem, seeing that Riku hates Dark and Risa loves him.

Taking place approximately 50 years after the original D.C. - Da Capo series, the story revolves around Sakurai Yoshiyuki and Otome & Yume, the two granddaughters of the original D.C. - Da Capo protagonists Junichi and Nemu.

This is actually the second manga based on Da Capo II in active serialization. The other manga, running in Kadokawa’s Comptiq magazine, is considered to be the “canon” adaptation of the story (i.e. it’s based directly on the game). As the title “Imaginary Future” suggests, this manga proposes an alternate deviation from the game’s premise, where fan-favourite Shirakawa Nanaka (speculated to be a descendant of the famous Shirakawa Kotori) is the story’s main heroine.

From Red Scarlet Dots:
In an era of competitive Idols, there's one idol group that gazes over all of them, overwhelming the masses and leading the idol world, the incarnation of Zeus himself… “Jupiter”.

Ordinary high school student Satoru Ikaruga, while he doesn't look like it, happens to be a genius vehicle user, kinda like a MacGyver of vehicles. And he's extremely good with all vehicles like jet skis, trucks, fighter planes and helicopters. If you can name the vehicle, he knows how to work it. Ikaruga works as a vehicle expert for a multinational specialist organization called the Almighty Support Enterprises (ASE) while trying to maintain his high school life as much as possible.

From Anime Waves:
Tsukasa, Tajima, Katsu, and newcomer Sae, were all members of the Hentai ShonenDai (Perverted Boy's club) at the tender age of 11. But as they grow older, how will each of their lives change? Will they grow apart, or stay true to the (perverted) passions they shared as kids. D-ASH is a story about the adventures these boys will have trying to grow up as fast as they can, being as naughty as possible all the while.

Chihiro Kouzuki is a stage actor and works part-time as a housekeeper to earn more money. His uncle called him about taking on a housekeeping job for Aoki, an elite businessman who lives in an expensive condo. Chihiro accepts, not realising how demanding Aoki can be about how he wants his condo tidied up. He is so demanding that Chihiro is starting to lose his patience with him...

1-2) Rainy Love
When Hayama Hikaru hears a mean rumor about his co-worker Nanashima Yukihito's "size", he wonders if it's true. But Nanashima turns out to be a sweet guy and they become friends. But does Hayama want more?

3) More than a Lover, Less than a Loved One
Fujimi Kyou has only been at the company two weeks, but his boss already loves to bully him. Now that teasing has escalated into sexual harassment!