From Midnight Scans:

After my Mom got married to her second husband, it made Chinatsu my younger brother. At first, I thought he was surely a perfect brother after seeing his angel-like smile, however, the truth is that he is really a pervert and very ill tempered! I was surprise when I found out my angel-like younger brother is really a little devil?! Will I just allow him to abuse me?!

Includes:
Koakuma Kiss (Kiss by the Small Devil)
Motto Koakuma Kiss (Kisses by the Small Devil)
Motto Motto Koakuma Kiss (More and More Kisses from the Small Devil)
Koakuma kiss -Again- (Kiss by the Small Devil -Again-)
Kimi no Junjou, Otome no Jijou (Your Pure Heart, Maiden's Situation).

One day a boy, who looks like a kitten to some stands, calls at Manato's door and tells him that from today on he'll be his roommate. It isn't long after that Manato "adopts" this boy as his "pet", but this kitty has its own aim. Anyway, while the "kitten" starts suffering under Manato's coldness, he gets more and more in some kind of love quadrangle of the more steamy kind...

Kouya is a brilliant, yet antisocial, research student at a medical university. He has no need for friends and brushes off even the gentle fellow student Rei, who admires him. But Rei's not the only one interested in Kouya, professor Katase started to make his move and there are very bad rumours about him...  

[From Peccatore Sanctuary]:

It was love at first sight for Iwaki Kei. Entering the drama club was to get closer to Kyoumizu, but the only roles Iwaki seemed to get were Passerby A or commoner B. On one fateful day, Iwaki saved Kyoumizu who was suddenly attacked by someone, and since then, he was called the "Princess' Knight." Jealousy from classmates ensued, but Iwaki did not seem to be overtaken at all. And, Kyoumizu has also become attracted to his charm... the topic of Happy School Life!

Rikuri and Ron and their adventures with the non-human side of their school.

Kasai Rena is a hard-working office girl with a peculiar interest she hides from everyone...

N/A

Yashi has wandered with her father for fourteen years, and only now has she discovered that her own mother is actually Bocinia’s current queen. To see her mother, from whom she was separated when she was just an infant, she and her father enter the palace, but she never thought she would accidentally run into the Princess of Bocinia, and then become her bodyguard by mistake...

NOTE: This manhua ends at Volume 4. The continuation of the story was written in a novel.

When Asahi was a young boy, he had a friend named Sakuya who only came out when there was a full moon. One day, she says that she has to leave him, but she gives him a small pendant that she says will protect him in her place. Ten years later, someone with the same name, power and aura as Sakuya saves him - but it's a guy!?

After the the world ended, a Sackboy emerged from the rubble. With little idea of what came before him, he spends most of his life wandering around the wasteland. Then came a very unusual day, Sackboy discovered a strange building. Upon entering, he comes face-to-face with "The Eyes" the computer game that ended the world. "The Eyes" tell Sackboy that they are dying and need his help... without hesitation, Sackboy agrees to help them.

From Shinnen:

Emi and Atsushi have been dating for one month now, and to be able to become one with the person you like is like a miracle. The feeling of happiness is overwhelming, but apparently, there is an unforgettable person for Atsushi. What should a person do in order to make his attention turn to one's self? An earnest love graffiti.

Other stories:

Shin Sekai
Iroha ni Hoheto
Omoware, Omou

It begins with the titular "Knife-Edge Girl", a story about two friends with completely different approaches to life.

Also includes "Graffiti," in which two women who use the same desk at different times of the day communicate by drawing messages on the desk top. Kana begins to happily anticipate exchanging these message and finds herself wishing to know who this stranger is who shares her desk.

In "Torte Fromage" Miwa's boring OL life is suddenly thrown into a world of glamour and excitement when she meets the beautiful avant garde actress Nagae-san.

Impressed by a vase she saw in the hallway, Mokako decided to join the pottery club so she could meet the person who made it. There she meets the artist, Shuri, and she teaches Mokako pottery. It isn't long, however, before Mokako starts hearing rumors about Shuri and the things she's done with past members of the pottery club.

THE BILLIONAIRE BOSS'S FORBIDDEN MISTRESS

Blessed with brilliant beauty and abundant wealth, Lena used to be a princess of the high society until an accident took everything away from her, leaving only an ugly scar on her leg. Moreover, her husband despised the scar and dumped her. "I'll never trust a man..." Since then, her smile disappeared from her face, she withdrew and lived a quiet life. She never expected her extremely sexy boss to be determined to make her his own.

English publication via Renta!

The series' protagonist Annelotte is seeking the head of reigning Queen Claudette for revenge and justice. Following her swift defeat and imprisonment Annelotte is now building a rebellion army to take on Claudette once more!

From Fantasyshrine:

Kikuchi Yo, a travel agency owner dreams of turning the "Blue Rose", a British noble mansion into a hotel. He enthusiastically approaches Baron Gilfred, owner of the mansion, with his plans. Unbeknownst to him, he's walking into the Baron's trap…! A gorgeous love story between a nobleman and a business owner.

Nakanomori Yuzu's family used to run a dojo. But when the Tenmonzaki family opens a rival business next door, they went bankrupt in a blink of an eye. Her parents died in a car crash shortly afterwards, leaving Yuzu and her brother in poverty, struggling to pay off their debts. Yuzu, in search for revenge against the Tenmozaki family, swears to defeat their son around her age: the rich and talented Tenmonzaki Yuu. She enters the elite National Tamateba High School in order to fulfill her goal, but finds that first impressions are not all what they seem- especially concerning Yuu. From NOIR: Our poor female character is a poor girl with a debt to the rich and powerful Tenmonchiki. She accepts to be a slave in order to pay off her debts but what are these feelings starting to bloom within her heart…? Could she possibly love this rich, arrogant and all too perfect guy?

It has been 300 years since magic disappeared from this world.

Or at least, that's what everyone thinks.

This is a tale about the last magician in the world, and the people he meets, including a certain retarded guy around whom his life will revolve from then on.

(If I can make money, I will do anything)

I can sell (give up on) my love, or risk my life.
You want to use me as a tool to revenge your little brother [or sister]?
Here, I will be used. Buy me.
I am very expensive.

Eun Hyool, you said you will do anything if you get paid?
I will buy every single piece of you.
From now on, you are my slave.
But, I will refuse your heart.

These two are getting used to each other by endlessly running against each other.
Love that formed through quarrels is risky like a flower at the end of a cliff!