From Ochibichan:

Aritsune is the head of the clan which wields the power of “Kaiyori”. As long as one can obtain the “Aya” which the clan head holds, no matter who, he will gain magnificent powers...
He lives a normal school life with his trusted aide, Chika and his beloved sister, Akira. But, without noticing, and also due to the powers he wields, everything started changing...

Note - This series was cancelled due to copyright infringement.

Low instincts, guilt, sin and fascination for the forbidden meet inside this forest full of harsh and fascinating tales. Because, after all, all human beings have secrets. Some hide feelings condemned by society and other hide the darkest and most shocking secrets...

[From: Mangaupdates] A continuation of the oneshot Kaizoku Game in Ousama Game that features the rest of Kuuron's pirate crew. 1) Yuuki's older brother got caught at his pirate lover and was imprisoned on the ship. In the time he is being supervised by a cook. All the meals prepared are untouched and the cook got angry since all the crew recognized his talent... And the problems all start when some people don't like the relation between them... what will happen... till they have a good ending? 2) Rika, the first mate of Kuron, has been in love with Kuron for 8 long years. Even so, he never confessed his feelings and so he relieves his "other love" off the pirate ship. But one of this sex friends joined the crew... and decided to help Rika... but all that made Rika have other thoughts... what will he do? Accept the help...??!!

(from back cover) "Pirates are the lowest~~!" Rose, a young girl who stubbornly believed herself to be such type of high-class princess. The one who came to “kidnap” that slightly restless girl some how ended up being a heinous pirate, a crew member of the "Phantom”…!? Blood will race, set sail on a love and romance adventure—Ahoy!!

From Aerandria Scans:

During the time when the world is full of barren lands and big ships sail out to the vast oceans, a very rare type of sub-human--mermaid--was born. Normally, they have white hair, but only in water does the color change. Among the aristocrats, they are traded for large sums of money. Hisui is a merman with scarlet hair, and he's kept by a lord. However, as he's stolen away by the pirate Ikuta and gains freedom, they start their journey together!

Kaji Ryusuke is a second son of a great politician. However, his father and brother both pass away from a car accident. Now, those who supported Ryusuke's father want Ryusuke to carry on the family business as a politician.
At first, Ryusuke tries to get out of the responsibility, but he eventually enters an election to become a politician.
This manga will view Japanese politics from Kaji Ryusuke's viewpoint.

Kajika's a trouble making little boy, part of the mysteriously empowered people of the ''Kawa'' clan. When one day he intentionally and cruelly kills a fox, the fox's spirit comes back and places a curse on the boy, turning him into a half-fox and severely limiting his abilities. The only way to break the curse is to save one thousand lives. And so Kajika sets out on a journey, accompanied by the fox's spirit. However, when he obtains the egg of the last remaining dragon on Earth, all hell breaks loose as he is forced to take on the forces of a merciless gangster who seeks the power that resides in a dragon's blood... While at the same time attempting to break the curse and finding out the rumours of what happened to his family of the Kawa clan.

One night, Eizo, a hapless corporate slave, saves a cat and gets hit by a truck. The cat which seems to be related to a parallel world, in return for his help, grants Eizo a skill of his wish and reincarnates him to another world. Eizo, who has craftsmanship as a hobby and wishes to use this skill for a living, chooses to be reincarnated as a blacksmith. And so he starts his life in another world as a blacksmith just as he wishes. However, Eizo's creations are at another different level that will shake this new world.

Author’s Twitter: https://twitter.com/tamamaru
Artist's Twitter: https://twitter.com/himori_yoshino
Kadokawa Books (LN): https://kadokawabooks.jp/product/kajiyadehajimeruisekai/
Web Novel: https://ncode.syosetu.com/n7266fe/

From Fafafap:

Ohno-kun's special skill is "hands-free masturbation"!
With his own fantasy, he could ejaculate without touching himself. He spent a fulfilling school life like this. Then the popular guy of their class Kureshima, suddenly became close to him~~~?
Getting the girls around them involved in their desire and devices as they go through their youth.

24-year-old Aki finds herself newly single when her long-time boyfriend cheats on her. She begins living in a sharehouse with a former classmate and boyfriend from junior high, Tomoya but he has his own personal problem. For the last two years, Tomoya has struggled with erectile dysfunction but finds himself "reacting" to Aki, and so he asks for her help to cure him.

From Mangascreener:

The main character is Leonora, the daughter of an impoverished noble of Padua. She is a beautiful silver-haired, emerald-green-eyed girl and very good at fighting with the sword.

One day, she is forced to marry an arrogant young noble, but she discovers on the day of their wedding that this man intends to use her to become king of Italy because she is involved in an ancient Italian legend: Leonara is the girl shown on "Kakan no Madonna" (Madonna of the Flower Crown), a famous painting drawn by Leonardo DaVinci. There exists a legend that tells whoever gets the legendary sword "Emerald Lion" will unite and rule over Italy. And the secret hiding-place of the sword can be found with "Kakan no Madonna"--that is, Leonara.

In order to find out the truth of the portrait's secret related her and to hide her identity as Kakan no Madonna, Leonara disguises herself as a black-haired boy, Leo, and sets out to find DaVinci. On the way she meets Falco, the blond-haired handsome king of Naples, who is unaware that she is a girl, and becomes his servant.

When she finally finds DaVinci, she hears with surprise that she - the girl portrayed in Kakan no Madonna - is destined to possess the legendary Emerald Lion and therefore to become queen of Italy.

From Comico:
Ayano, Tsubasa and Ichinose, Yuu are childhood friends. Since they were kids, they were inseparable. But one day they have to part each other's way because both of them are transferring homes. Clueless of where they will transfer, they were shocked when they see each other going to the same school from the place they transferred in.

1-3) The Cupid Who Ran Off
(Kakedashita Cupid)
Mayumi is a shy high school girl who watches Yamano from the other side of the fence after school; she loves the exhilarating moment when he high jumps and is flying through the blue sky. She can see it even when she closes her eyes. But is she so intent on watching Yamano-kun... that she doesn't notice that he's watching her, too?

4) I Can Hear the Footsteps
(Ashiato ga Kikoeru)
Shizuka's charm bracelet comes with a condition: She can have any wish she wants if she can suppress her favorite thing for two months. Her wish is to be a more grown up woman, but handsome, and surprisingly childish classmate Naoto may make that impossible.

5) Peter Pan I Love You
(Piitaa Pan no I love you)
When flighty Eri accidentally injuries Takumi's hand she finds out what a sexist he is. He thinks girls are loud, spoiled, and cry easily. Eri is determined to prove him wrong. However, Takumi begins to change Eri's opinion of him as well..

6) Of Course I Can't Wait Until Nightfall
(Mochiron Yorumade Matenai) from the series 'Yoru Made Matenai'
Haruka's grades have been falling, and she's pretty sure she knows the reason: Her new stepbrother and affectionate lover Tsukasa. To keep herself from being distracted, Haruka imposes a no kissing rule on Tsukasa. But he's not going to give up without a fight...

Hyakkaou Private Academy. An institution for the privileged with a very peculiar curriculum. You see, when you're the sons and daughters of the wealthiest of the wealthy, it's not athletic prowess or book smarts that keep you ahead. It's reading your opponent, the art of the deal. What better way to hone those skills than with a rigorous curriculum of gambling?
At Hyakkaou Private Academy, the winners live like kings, and the losers are put through the wringer. But when Yumeko Jabami enrolls, she's gonna teach these kids what a high roller really looks like!

Note: Placed 3rd in the DaVinchi x NicoNico Tsugi 2016 Manga Awards.

A 4-koma parody spin-off series of Kakegurui featuring all characters from the series and their everyday lives.

Kakegurui - Yorozu: Official Comic Anthology is the exciting anthology edition spin-off of the popular gambling girls franchise, Kakegurui! With 32 of today’s best artists all bringing their unique skills to the table there’s even more fun to be had with this collection of original manga stories.

Spin-off of Kakegurui that focuses on Ikishima Midari and when she began her role in the Student Council.

Set one year before the main story and centred around Saotome Mary.

Saotome, a bright young girl born into an ordinary family, has passed her transfer examinations and started to attend Hyakkaou Private Academy. It's an elite school with a twist: gambling has become a central part of its academic activities. Saotome adapts quickly to this outlandish system, and will soon succumb to the gambling mania that she comes to be known for in Kakegurui.

From Yen Press:

The Mad Tea Party…To members of the elite house of Kuonji, a clan whose name has incredible pull all over the world, this monthly gathering is the only tried and true (not to mention mandatory) family tradition. But one such family reunion brings with it some unexpected and horrific news for the nine Kuonji siblings, and it comes straight from the lips of their mother Olga. To become the next head of their illustrious family, the siblings must fight each other to the death! As chaos erupts, Stella, the fourth daughter, loses it, and suddenly a whole new Stella, complete with blonde hair and blue dress, comes out to play?!