To Lady Takashima, the breach of etiquette is deserving of the death sentence. As the hate towards the lack of manners arises within her, the feeling of "I want to try it" has also arisen within her. This work is the record of the daily life of the Ojou-sama struggling with her guilt.

On a school trip to shinobi-themed Ninjatown, a young man named Ichi Kuno accidentally springs a mystical ninja trap which sends him back to the Age of the Ninja. Having no other path, he must pose as a girl and infiltrate Kurenai Academy, a school of kunoichi students, to retrieve a mystical scroll that can return him to the future. But when everyone around him is already far better at stealth and infiltration than he could ever imagine being, it's not going to be easy. He'll need to employ his own special bag of tricks, and have a lot of luck, if he's going to last more than 5 minutes surrounded by hot kunoichi girls, every one of whom would happily kill him in a moment if he's discovered.

"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,

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!

The misadventures of Son Goku, Krillin, and other friends from the original story. Supervised by Akira Toriyama.

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

After a complete and thorough "healing" experience, what the girls ask for as payment is...

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 ...?

The son, tired of his overprotective mother that has a son complex with a huge imagination for misunderstandings for him and will protect him from all.
Tries to go on an adventure but his mother tags along whether he wants it or not.
NOTE: The mother is the strongest person in the country (OP level)

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

This comedy manga takes place in a college girl named Yoshizawa's room. Her friends, Itou, Kitahara, and Nishida often stop by, and they run into funny adult-level problems. For instance, there is the day when her friends drop by while Yoshizawa's hungover in bed, and she suddenly realizes that she doesn't have on any underwear under the covers.
Yoshizawa also has unusual problems, like her need for advice on drawing realistic penises in her manga, since she's never encountered one in real life before. There are a lot of quirky things that can happen in a college girl's home.

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...

After years of barely talking to her big brother, Uiha suddenly wakes up to find that she has a body-double, who is both her copy and her complete opposite.

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!)

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?