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...

Yes it is.

Raws: http://seiga.nicovideo.jp/comic/43318

[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.

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!?

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.

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!

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?

A collection of stories that revolve around a certain kingdom.

1. Love Came Dancing Down + Extra
Even before he was born it had been decided that the heir of the Haku Family, Reion, would be betrothed to the youngest child of the Koku Family, Kaen. For his coming-of-age and wedding ceremony, Reion visits the House of the Koku Family. However, Reion was no longer the boy he first saw in pictures, but a man overflowing with confidence. Furthermore, Reion left the words "I am as appalled as you are about this wedding between two men." - Blissful Sin

2. Oriental Gorgeous Legend - First Story
A young boy from the Sei family, the land neighboring Koku, wanders into the Forbidden Forest and discovers an injured man lying in the flowers. Both strangers are shocked at the appearance of the other - the young Sei boy, Renju, with violet eyes and black hair and the platinum-haired Katsuragi with sharp facial features. The two strike up an unlikely friendship, and Renju discovers that he is a rare person who can cross a barrier that surrounds the forest. The ancestors of the two families had feuded since long ago... but can Renju and Katsuragi endure the obstacles and keep their friendship?

3. Oriental Gorgeous Legend - Second Story + Extra
After catching a cold while waiting for Katsuragi and recovering on Katsuragi's side of the barrier, Renju's grandfather forbids him to leave the manor but soon collapses from the stress. Renju's uncle returns to see how the two of them are doing, and ends up explaining everything to Renju... a complicated past that Renju and Katsuragi share. When Katsuragi suddenly appears on Renju's side, things become even more complicated. Will the two finally be able to stay together?

4. Story of Love + Extra
Shion, Reion's older brother, suddenly became the head of the Koku family when their eldest brother died. But for him, there was only one thing he wanted: to bring his old bodyguard Gii back to his side. Things take a bad turn when Gii refuses violently... but it seems that Shion might have a bit of a masochistic streak?

5. Flaw of Paradise + Extra
When Shou's house was attacked by rebels, he watched his father be killed in front of his eyes... by the hand of his trusted companion Nachi. From that moment, Shou spent his days betrayed and raped in a small room, locked away from the world. His paradise had been taken away by the man he trusted the most.

From Attractive Fascinante:

Shouji was upset when Shimazu cancelled their appointment. Minami approached him and told Shouji that he knew that Shouji was having an affair with Shimazu. Shouji denied it and Minami asked Shouji to let him stay over at his house for the time being. With Minami stepping into his life, would Shouji finally let go of his tiring love with Shimazu and accept Minami?

Igawa and Takagi work in the same company but do not get along with each other. Igawa thinks that it all started when Takagi collapsed during training retreat and Igawa insisted on carrying him to the infirmary which hurt Takagi's pride. Now, their boss has threatened them to either start getting along or else their bonuses will be withheld. How will these two ever get along?!

A collection of fantasy oneshots with a dash of animal-ear flavor. An onnagata inspires a young boy to get in touch with his inner woman, a family of foxes teach a miserable young tailor to cure leather, a cat is trapped in a pretty intense love triangle, a bumbling newspaper club member is delegated to photography club duties, a boy with a history of sexual abuse falls for the painter he wants to cover those memories up, and a merboy falls for the wrong man.

From Alice Dreams:

Shiina is a rich daughter of a business man who went bankrupt. She lost her house, and her engagement was broken off. The only thing left for her is a club that was left in her name. Having no idea of what the club is, she visits it, and manager Ryuichiro comes to meet her. She soon finds out this club might be far more than a girl brought up in high society can handle!

Kamio Shuuji, the heir to a rich organization, has just transferred to Hazuki's average public high school. When Kamio catches Hazuki's eye with an intense gaze Hazuki begins to wonder over his attentions. Especially when Akira, his lover, warns him to stay away from him. He intends to do just that, that is until Kamio claims to have fallen in love at first sight with Hazuki, giving him a kiss to seal the deal. But what exactly are Kamio's intentions? And why has Akira warned him against the heir in the first place?

From Nakama:

1-3) Shijo Kei has no interest in men younger than 40! Because of this fetish, he had gotten into numerous indecent relationship and heartbreaks. His kohai, Hiro, can always be counted on to comfort Kei as his "cushion'. Until one day, facing yet another Kei’s self-inflicted anguish, Hiro finally snapped and declared, "Try me!" before he crushed a totally stunned Kei into the bed with his pent-up passion!! Can Kei’s broken heart be mended by the sweet pain of a younger man’s vigorous embrace…

Right after he was dumped, Tarou got a call from his newly-wed older sister, asking him to babysit her husband's teenage son. Tarou arrived to find a disrespectful 17-year-old kid who seemed to hate his guts. How would Tarou cope with the situation?