From MangaHelpers:

300 years ago, the demon lord attempted to take over the world but was defeated by a hero. But now, the demon lord has been reincarnated in the form of a cute girl who doesn’t have any memory of her past. She still retains the same deadly powers, but her only resource is the memory robot assistant. The reemergence of the demon lord also means that somewhere, a new hero has appeared. The demon lord creates a fairy named Mao to locate this new hero who is said to have the hero’s mark on his neck. However, what Mao finds is Alsha, a weak and a little timid young boy. As the cute demon lord observes and guides Alsha through Mao, who she has a direct connection to, in his quest to become the strong hero, she finds that he really is a hopeless young kid. [vyc]

One day, Seo Jihoon receives a set of clothes that if worn, gives him a mysterious power. But the clothes... are so perverted!

A dramatic collection of stories linking four men and their "half-baked" lovers. Follow the merry-go-around of inter-linked men and their relationships as they come full circle during Advent season.

There is a place in heaven that is a "new Vienna" where classical musicians gather. The story follows Beethoven, who will meet other musicians like him, like Mozart, Liszt, Ravel, Bach and many more!

Shiori Michishige has always dreamed about meeting her "fated lover." During the spring break preceding her first year of high school, Shiori starts dating Itsuki Karusawa. Although she thought she had finally met her destined soulmate, Itsuki cheats on Shiori and the two break up. Shiori then makes her high school debut with every intention of finally finding her true destined lover and take revenge on her cheating ex-boyfriend... but Itsuki happens to be in the same class!?

A what-if story taking place in parallel world which focuses on the relationship between Kiyotaka Ayanokoji and Suzune Horikita.

A joint effort between popular illustrator Yasu and KUMETA Kouji, creator of Sayonara Zetsubou Sensei, this manga features female rakugo* storytellers. After stepping off the stage, these comedians chit-chat in the girl's dressing room. This is a comedy that begins after the storyteller has said goodbye to the audience!

*Rakugo is traditional Japanese comedic storytelling. A single person will sit on stage in traditional Japanese clothes and tell the audience a funny story.

Koide was turned into a vampire at the age of sixteen--one hundred and thirty three years ago. Now, poor Koide is trapped in an eternal loop of the same old homework, the same boring lectures and meaningless tests, and an ever-unquenchable thirst for blood. Koide has repeated his uneventful sophomore year of high school one hundred and thirty-three times, and now, in his one hundred-and-thirty-fourth-year, he doesnt expect things to change and is frankly too bored to care.

But his classmates this year seem a little different than ever before. Theyre thrilled to have a vampire in their midst, and are eager to do whatever they can to help. Will 134 be Koides lucky number or is that just wishful thinking?

After her parents divorce, Maki moved from Tokyo to the countryside with her mother and met a mysterious woman.

A young mermaid finds some ero magazines discarded in the ocean. She decides she wants to be human when she grows up so she can marry one and have fun. Unfortunately, the spell a mermaid witch gives her so she can have legs on land doesn't work when she gets excited.

Onodera Ritsu has just transferred from his father's publishing company to Marukawa Shoten. Assigned to the shoujo manga division, he crosses path with the person he'd least expected to meet. Takano Masamune is the editor-in-chief of the division Ritsu's been assigned to, and the two seem get off on the wrong foot right from the very start when Takano unexpectedly kisses him. However, there is more to than what meets the eye: Takano is actually Saga, Ritsu's senpai and high school love, whom Ritsu had thought to have played him for a fool by taking his affections for granted when he confessed and summarily dumped him.

Nightmare is the Branch Chief of a certain evil organization, however, she has a secret that she can't show to her subordinates, a room where she slacks off after works using various healing items. A refreshing comedy full of healthy information!

One day a junior high school sophomore student Kuro-chan, discovers aliens coming out of her closet! Now, it's up to her to regulate these migrant aliens!

A personification drama about the internet, "Hey, aren't you a passerby?"

When class representative Takeyama comes to the house of a classmate to collect school lunch fees, she is drawn into the problems of Yasumi, the only living member of the debt-plagued Matsudaira family, and her loyal maid Miharu as they struggle to pay off their debt in spite of Yasumi's "minus fortune".

From Decadence:

This manga is a love comedy collection of oneshots about how mysterious meetings can lead to falling in love before you even realize it! These stories will be sure to make laugh and cry at times.

Volume One includes...
-The mysterious NEET owner who appears every evening from the floor above.
-The husband who struggles to support the love that has come to visit his wife
-The strange businessman who has purchased a gravestone for his final resting place?!
-The little brother who suddenly appeared in the room of someone living alone...

Today, the city--tomorrow, the world! That's the plan of Il Palazzo, the haughty, pretty-boy leader of ACROSS, a secret society based somewhere deep beneath the streets and sewers of Fukuoka, Japan. It's a good thing he's starting small, because ACROSS begins its bid for global domination with just two members--Il Palazzo and Excel, the teenager girl smitten with him. After setting up house in a cheap apartment, Il Palazzo explains that the budget for world conquest and the budget for room and board must regrettably be kept separate. Their neighbors are a trio of regular guys, whom they hope will all overlook the irregularities of their comings and goings; not to mention the sound of screams, struggles, and gasoline explosions!

A generation ago, an abominable war foisted a "devil's contract" upon the soldiers of countries warring on a single continent. In the middle of the legacies of that war, Cecily Campbell, a daughter of a noble house with diminished power, joined the knighthood of the free city she lives in.

One day Cecily encounters a man who dispatches some hoodlums with one sweep of a mysterious sword. The man possesses the power on the same level of the "devil's contract" that has become taboo, now that peace has been restored. Cecily has been searching for a blacksmith who can repair an old sword she inherited from her father, and that mysterious young man happens to be a grumpy blacksmith named Luke. This encounter launches their adventures together.

From the English publisher of The Sacred Blacksmith, Seven Seas:

Like her father and grandfather before her, Cecily Campbell has entered the knighthood and joined the ranks of the Knight Guards of Housman. Eager to do her heritage proud and defend her city, Cecily rushes to the marketplace to stop a madman from terrorizing the populace. She quickly realizes, however, that she is hopelessly outmatched and ill-prepared for an actual fight. A lone figure named Luke Ainsworth swoops to the rescue, a swordsman and blacksmith of much renown, who will repair the broken sword Cecily has inherited from her father and take her down a road of perilous adventure beyond her wildest dreams.

The story of a girl who misses her cat, and how she lures a cat-girl to her apartment.