This is part 2 of Gambling Emperor Legend Zero, picking up a few years after the cliffhanger ending of part 1.

A girl named Hiromi dreams to become a prince. One day a cute girl named Juri transfers into Hiromi's class. Due to Hiromi's cute looks she is bothered by Hiromi's classmates. Juri blatantly rejects Hiromi's classmates' invitation to join their group and she earns some scorn from Hiromi's friend, but Hiromi doesn't wish to bother Juri.
After Hiromi takes initiative to speak to Juri, Juri becomes attached to Hiromi and nicknames her Romeo.
Thus the story between Juli/Juri and Romeo/Hiromi begins.

A weapon only permitted to a chosen few, and two men who use their weapons for two entirely different purposes.

From FairyFly:

Tsuzuki Rika has just started her high school life, hoping to have a "sweet love". But she fell in love with a senpai, who's in love with another girl... no matter how hard she tries, her love is unlikely to be returned... sweet, yet painful adolescent love.

Enter Hikawa Naomi, son of a music critic and Ebisawa Mafuyu, a young prodigy pianist who suddenly disappeared from the music world.

The story is set in the Edo period of feudal Japan. It revolves around Yamada Asaemon, nicknamed Kubikiri Asa (literally "Neck-chopper Asa", often transliterated as "Decapitator Asaemon"), a ronin who is responsible for testing new swords for the shogun. The character is based on a real-life line of sword-testers who served the Tokugawa Shogunate up to the early 19th century. -- Wikipedia

Hime is a natural blonde and with that comes basic expectations: for her to excel at everything and to speak English proficiently, and unfortunately to be a complete ditz and have many boyfriends. When Minami catches her studying English by listening to 'English for Dummies' the two become friends. But soon Minami falls prey to the rumors and distances himself from Hime. Will the two ever be able to regain their friendship?

From Angry Fox Scans:

The story is about the Himenokouji twins named Akito and Akiko who got separated due to certain circumstances and after years of living apart they suddenly began to live under the same roof once again. Things were fine at first until Akiko began expressing her love for her older brother. Now Akiko must fight to defend her extraordinary love for her Onii-chan as she battles against all odds and three other girls who are after her beloved Onii-chan.

From Hochuuami:

Prince Ashide decides to agree on a wife, but too bad for him a lone deserter of the country of Ishugal shows up instead to claim the title of Princess.

extra story: Beloved Affair
The older son of feudal lord of Crimson Country, Nagi, loves the surly/arrogant spy, Kari. Kari who always refuses Nagi's courtship happens to know that Nagi loved the lover of his father who had same red eye like Kari. Kari feels anger for Nagi who loves him as substitute...

Monster weaves the riveting story of brilliant Dr. Kenzo Tenma, a famous surgeon with a promising career at a leading hospital. Tenma risks his reputation and promising career to save the life of a critically wounded young boy. Unbeknownst to him, this child is destined for a terrible fate.

A string of strange and mysterious murders begin to occur soon afterward, ones that professionally benefit Dr. Tenma, and he emerges as the primary suspect. Conspiracies, serial murders, and a scathing depiction of the underbelly of hospital politics are all masterfully woven together in this compelling manga thriller.

Note: Won the 46th Shogakukan Manga Award in the general category.

beginnning with the Bloody Valentine War between Earth and the colonies,On one side is the Earth Alliance, and on the opposite is the space colonies that form ZAFT (Zodiac Alliance of Freedom Treaty). Mankind is divided over human genetic engineering, with normal humans known as "Naturals" and the genetically altered humans known as "Coordinators".While ZAFT has a head start on mobile suit design, the Earth Alliance quickly catches up with its five prototype Gundams. With ZAFT having stolen four of the prototypes, young Coordinator Kira Yamato pilots the GAT-X105 Strike Gundam and is forced to fight his old friend Athrun Zala. Little do they know that there exist sinister forces working to bring about events that go far beyond their worst nightmares. -Taken From Wikipedia

The setting is Lillian Academy, a private Catholic all-girls school where the student council is known as the Yamayurikai (Mountain Lily Council) and younger students are taken under the wing of older students through a system known as the "soeur system" ("soeur" is French for "sister"). The main character, Yumi, who is basically a nobody, suddenly finds herself interacting with the members of the Yamayurikai and their soeurs, most notably her crush, the talented, beautiful, and withdrawn Sachiko...

Iori is a timid, feminine boy. Masaru is an aggressive boy who leads the other boys in bullying Iori. One day, they encounter a pair of strange extraterrestrial bunnies who turn them into magical girls in order to fight aliens that are invading their town.

In the Kekkon Kirai no Sankyoudai series(結婚嫌いの三兄弟; The Three Marriage-Hating Brothers), also called the "Billion-Dollar Braddocks" series:

1) Onzoushi no Yuuutsu (御曹子の憂鬱; The C.E.O.'s Unplanned Proposal):
When Adam, the oldest son of the wealthy Braddock family, asks Katie to be his party planner, she is taken aback. Doesn't he know that she's just a waitress? Adam's zeal eventually wins her over and she agrees to the job despite the misunderstanding. Katie is surprised to see Adam's gentler side during their time together, but still, with his cold, businesslike nature, it can't end well…or can it?

2) Koi wa Butoukai de (恋は舞踏会で; The Playboy's Office Romance):
The career-driven Lara can't believe that her new boss is the spoiled playboy son of the wealthy Braddock family. As a professional, she cannot accept the idea of someone like him running the company, so she marches into his office with her letter of resignation in hand. But Bryce pleads with her to stay, and somehow Lara can't argue with the sexy glimmer in his eyes.

3) Lady e no Kaidan (レディへの階段; The Blacksheep's Arranged Marriage):
Thea is the ugly duckling of high society. Shy by nature, Thea has never had a chance to blossom from under her grandmother's thumb. Thea has admired Peter Braddock for years, and agrees to let him escort her to a ball one night, but the two of them get soaked in a sudden downpour on the way home. She lets him in to change and dry off, but when her grandmother sees the two of them undressed in her room, she jumps to conclusions and sets in motion a huge scandal that will shake both of their families to the core!

English publication via Renta!, part 2, part 3

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!

Himeno's chest hurts if any boy touches her because her heart is a diamond. However, when she was young, she befriended two boys--gentle Mamoru and blunt Keigo--who could touch her without harming her. Without knowing about her diamond, both Mamoru and Keigo promised to protect Himeno. When some people threaten to take Himeno's heart, who else will protect her but her knights?

Betrayed by the ones he cherished most, and after graduating from high school with a series of heart-breaks; Black left his home and lived away with a friend of his dad’s. In the greyscale life he lived, he longed for nothing but the end of his life, until a a person from the past crashes out of nowhere to re-add the contrast Black needs.

From Nekohana:

It all starts when Tomoe's hair gets caught in Kouga's button. As if by a red string of fate, they're tied together. Through a twist of that fate, Tomoe is forced to work in a house of prostitution lead by the yakuza, and who might be one of the yakuza heads, but Kouga.
Funny and dramatic, but more innocent than you think.