A lonely girl finds a devil doll on a rainy night. What will happen?

Aya and Hiromi are students at the same nursing school. Aya has known from a young age that she is a lesbian, and when she falls for Hiromi, the two of them end up becoming a couple. Thanks to Aya's influence, Hiromi begins to come out of her shell and stand up to her strict, controlling parents. However, her newfound rebellious streak could spell disaster for their relationship...

A mixture of off-the-wall family comedy and bittersweet love story, For the Mermaid Princess is the story of a girl with a gentle manhwaga father, a whip-wielding nutjob of a mother, and four older sisters.
When her family moves to a new house, Lee Suelbi discovers just how difficult it can be to balance family, friendships, and love.

From Chinatown KM:
Chapter 01 - Aiqing Wasaibi (Side Story/Oneshot)

Chapter 02-04 Flying Free
A story about a girl who has always studied hard in school and has never broken rules. However, she has never tasted what true freedom is.

Chapter 05 - Another side story/oneshot.

Through a husband and wife's bickering, everyday life, we can see into their minds and understand why people act the way they do.

Se-Joon and Se-Wa are siblings with a dark, complex relationship. Se-Wa, a girl considered psychotic by others, is attached to her brother... a little too attached. In her eyes, there is only Se-Joon, and no one else. And what of Se-Joon's feelings?

This manhwa contains incest themes.

Title comes from French poet Beaudelaire's compilation of poems, Les Fleurs du mal.

When Ryou moves into a new apartment block, his neighbour Makoto makes no secret of the fact that he likes men, and Ryou is forced to confront the secret doubts he's always had about his own sexuality. Things get complicated when Makoto's history with the other resident of the building, Nanno, results in jealousy, tension, and love triangles all around.

Deep in the palace, lives a girl named Yu Pan. Forbidden by her mother to go even to the outside, Yu Pan entertains herself by learning as many things as possible to be fit to be one of the Prince's mistress. Because of her eagerness and talent, the emperor invites Yu Pan to study with the Prince. Can she love someone whom she's never even met...? -- Manga Updates

From Evil Flowers:

A very poor high school girl finds a very rare brand dog on her way home. Grateful for her help the dog’s owner gives her a huge house as an award, but, in order to have it she must continue to take care of Gold, the dog that she found. Will the money be worth it?

Basically, it's a retanking of some chapters from Full Metal Panic!. It's sort of like FMP! Fumoffu.. meaning that there's no mecha plotline, only short stories. Also there's an extra story not presented anywhere in each volume of this series.

One day, a ronin student on his way home gave a bentou to a cosplay cat girl. Unexpectedly, the cat girl then decided to stay at his house, resulting in the two living together. But then, the girl turns out to be one of the mountain shrine's Gods…

Having to deal with the girl’s magic plus the teasing from other cats and Gods keeps the main character’s hands absolutely full. Will he ever get a break or will this “big pet” burden him forever?

Kanna Haruhiko (male), for reasons unknown to him, is suddenly turned into a girl.

He returns to his male form some time afterwards, but with the continuing cycles between turning into a girl and then back to a guy, he is bewildered by the differences in both physical aspects and ways to communicate with other people.

Plus the abrupt changes that happen to his relationship with other people including his best friend and his childhood friend.

A dramatically depicted story about men and women...

Their city is filled with criminals and three incredible high schoolers. Yugo, Rikiya and Tasuku are determined to clean up the city with whatever means necessary, even if that means using violence.

During a typical night of wiping out gangs, Tasuku comes across a beautiful girl held prisoner. She helps him survive what would have been a mortal wound by allowing him to see the future. Tasuku takes her home where he finds that her name is Noah, she doesn't speak at all, and has no memory. Even more fascinating to Tasuku, she bears the same tattoo as the person he has been searching for years for.

Three quarters of the world is the world of the dead. The world has been invaded by phantoms. One day, a boy named Nagi finds in the mountains of scrap wood a mechanical teenage maid girl. He immediately takes her home to repair her. The first things that Elise, this mysterious mechanical maid, says is, "Good morning, Nagi." Who is this mysterious silver haired girl? The fate of the world rests in their hands.

From Tokyopop:

Yuuki is an energetic teenager who carries the disturbing power of foresight in her dreams. She finds that this is tied to the mysterious Deep Sleep that has overtaken her sister, Yuuka.
Clues left on her cell phone and visions that come to her in her dreams begin to reveal a strange puzzle... and then in one dream, a glass wall stands between her and her sister while a faceless little girl stands by Yuuka. The mysterious girl hands Yuuki a kaleidoscope--which Yuuki discovers she still has when she awakens from the dream the next morning...

In the Fuhoni! (Unwilling!) series:

V.1 - Fuhoni!
Hikawa Chihiro had always been a flirt until he met his match, Jyounouchi Haruhisa. Being the older one, he wanted to change the fact that he was the one being held. While having internal conflict, the appearance of a new younger rival, Koide, made Hikawa realized he had to be honest with himself or to risk losing Jyounouchi. What would he do?

V.2 - Ran
The continuation of Hikawa and Jyounouchi. What happened when Jyounouchi nii-san tried to break them up? When Hikawa found that Jyounouchi's new neighbor, Toba Kouhei, was his ex-classmate, he refused to go to Jyounouchi's place again. Toba asked Hikawa to join him as his business partner. What would Hikawa do?

V.3 - Goku

Miyano Amata, known as the "Perfect Prince" for his intelligence, looks, and cool personality, is asked to substitute for his sister as an attendant at a doujinshi convention disguised as a loligothic girl. There he meets a girl from his class and they become friends, but he must crossdress in order to be with the girl while learning about the fujoshi fandom.

Notes:

? Fudanshi = BL fanboys: Some may be gay, some may be straight. More info can be found here.

? Fujoshi = (Literally) Rotten girl: A pejorative Japanese term for female fans of manga and novels that feature romantic relationships between men, often with the implication of yaoi concept.

What can a charm book do for a girl in love?

Youta was living with his big brother when a guy named Takamasa, a colleague of Youta's respectul brother, suddenly stepped into their life and after a bet, tried to seduce him... ~from Countless Time