From MangaHelpers:
Azuraito, an orphan taken in by a group of traveling entertainers, has always been able to see spirits that others can't. When he was four, two traveling doctors, who seemed to have the same ability he had, healed one of their troupe members. They left, but people who seemed to either be them, or be exactly like them, showed up seven years later. This time, they joined the troupe as two entertainers, Rebi and Sando. Rebi and Sando were kind of mysterious, and held themselves a bit away from the rest of the troupe, but Azuraito was determined to get to know them. Through his relationship with them, he hopes to learn much more about his abilities and the supernatural part of the world that they both experience.

"My sweet songbird-- my eternal love--
Don't make such a sad face.
When my little songbird gets sad, it feels like my entire world is raining."

The duke known to many as the grim reaper, "Rowan Peruka".
He, the very person who was about to chop off my head last month, managed to become my husband?!
He took me in not as a second or third wife, but as a first one at that?!!

I'd love it if this was true love, but this is all thanks to a mysterious magic spell. And the magic spell's power's been weakening to boot--!

A marriage with a bipolar(?) husband where your own life is at stake,

Tachibana Haruka is a college second year. She gave up on her dream to live a new life. One day she meets Hayama Nao, a first year student trying to become an actor. Each feeling the opposite towards theater, with unspoken feelings and unasked questions hidden in their hearts, their mutual attraction begins.

Athanasia Cloix, a woman whose elegance and beauty is akin to that of a swan lake, was the Duke’s eldest daughter and the Queen of the social circles: an existence near to perfection. Due to some rumors, however, people began to misunderstand and belittle her. As she suffered through these unfortunate events, she learned to conceal her feelings by putting on a façade and agreed to a political marriage with the Winter-comer who's also known as the “Northern Monster”.

"As the Grand Duke, I will do my best to accommodate your needs and desires. But love alone is something I can't give to you." Unbeknownst to her, that very man will change her life and thus a new fate is about to unfold.

From NovelUpdates:

The high school girl Manami who had fallen down the emergency stairs at school had, before she noticed, become a three year old in the world of an Otome Game. What’s more, that little girl was one of the rival characters that appeared in the game; the can’t-take-a-hint-burikko-type-rival daughter of a marquis family. What awaited her at the end was social obliteration. Though she did get a bad feeling about this… Manami decided not to worry! It was a dream after all, so that had nothing to do with her. For now, she’s going to master magic! Hooray!

An anthology of Tsukihime－A piece of blue glass moon－created through a collaboration of artists who love Tsukihime.

From Chibi Manga:

Yuu is a plain girl who had a determination to change when entering high school. Falling in love with the hot guy nicknamed as "White Prince", but somehow she's keeping an eye on the super sadist guy nicknamed as "Black Devil" too?!

Serialized series based on the "A Succubus Yuri Story" doujins, featuring an alternate storyline.

A fabled genius at killing resides somewhere hidden in Osaka. Taught since childhood to obey the orders of his boss, he is ordered to live in Osaka as a normal person for one year in order for the boss to lay low.

Shindou works at a company where a certain product is being created. A product that is a cyborg sexroid modeled based on an actual boy’s body. Shindou is then grudgingly put in charge of their prototype. He is initially very against his new assignment, but this cyborg boy eventually manages to melt his heart.

The general election of love begins with the seat of the No. 1 heroine! At this school, once a year, there is a so-called "Goddess General Election" that decides the school's No. 1 heroine "Goddess (Muse)". The childhood friend Tsugumi Aiba, whose main character, Shield, has a passion for, is the winner of the previous year. Her shadow classmate, Uzura Takahina, says, "She wants to participate in the goddess general election," at her shield, which is trying to do something with her hunger that was shaken by the thrush ...?

One day the tyrant, Estian, sent a marriage proposal to Cecil. She got dragged to the empire unwillingly but when she saw the emperor's face she had a change of heart.

"You're quite the hottie aren't you?"

She liked her husband.
And her husband likes her back too!

To live happily with her tyrant husband does Cecil need to become a villainess far worse than the tyrant?!

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Based on the Original Webnovel by Yu-Iran

Ameri has no interest in romance, nope, not at all with silly couples doing silly thing throughout Japan she rather avoid it all together. Yet Ameri does remember when a boy confessed his feelings towards her in middle school, but in all honesty she believed it was nothing but a joke. It's reflection time and maybe romance time? Only Ameri can decide her fate.

Ariadna Lereg Ilestri Pre Agrigent…

And so my life begins with this ridiculously long name, born to royalty and the center of attention — all because of one dangerous man; the veritably insane tyrant king, ruthless conqueror of ten empires, nightmare of all continents… and my father?! Will I be able to survive with this maniac?

Moukin Rui is a strange girl. She can turn her neck 180 degrees and jump down from tall trees without a problem... There's is a certain thing that a girl like her is worried about, though...

The young man's new apartment is haunted, but as it turns out, even the dead have their own personal shortcomings... issues of the flesh included.

For the dead have lingering desires, and are more susceptible to the world of the living than what one may think. There's anger, there's hate, there's curiosity... and there's love too.

Here he finds a ghastly girl who observes him quietly, certainly desiring something...

(No wonder the rent is cheap!)

"Is this a dream or a miracle?"

A plain and inconspicuous girl, Mari Jingyouji, was confessed to by Shiger Hanamizuki, the most popular boy in the class, after she saved him from dying in a car accident. But there is a reason why Mari is not happy. That's because, her family are all "○○○"... ... .

Summer, ghosts, and my feelings for you.

Yamano is a second-year high schooler in love.
One day, out of nowhere, the very object of his affection, Tanigawa-san, appeared in front of him. As a ghost.
It seems that she died after being involved in some kind of incident.

To save Tanigawa from death, Yamano gets busy trying to change her future, but—…
A vague and fleeting youthful mystery.

A teacher comes to an island to teach while staying at his former professor's house.

When he arrives though the professor is gone and he is expected to live alone with just his high school daughter Aoi and a cat.

[From Viz]:
Being a teenage martial artist isn't easy, especially for Ranma Saotome, who went through a major transformation on a training mission with his father. After an accidental dunk into a legendary cursed spring in China, Ranma now changes into a girl every time he's splashed with cold water. That would be enough to complicate anyone's life, even without the arranged fiancée who doesn't like him (or says she doesn't) and the constant stream of rivals and suitors for both his male and female forms. What's a half-guy, half-girl to do?