Nogami Kasumi, a young high school girl, moves in with her unrequited love, who turns out to be a bit...

From DrCoke at MangaHelpers:

Six years ago, Tsukihiko was caught in an assassination attempt on a little girl, Sami, when he attempted to be her shield. This incident nearly killed him and the girl together, but the little girl was the daughter of an extremely powerful family. With its vast amount of resources, the family was able to keep both Tsukihiko and Sami alive by recreating both of their bodies with cyborg technology. This has forced Sami to permanently rely on wired connection to her life sustaining computer. On the other hand, Tsukihiko has become a cyborg "Knight," sworn to protect Sami from harms way.

When he first logs-on, he sees his friend fall into a coma before his very eyes. Now Kite is searching for the answers as to why, and how to save him, inside 'The World'. Based on the original PS2 .hack series, Infection Expansion (Vol.1), Malignant Mutation (Vol.2), Erosion Pollution (Vol.3), Absolute Encirclement (Vol.4).

When an object is cherished for 99 years a deity is born within that object; also known as a Tsukumo deity. Yukiji's companion, Tamakichi, is a deity; he was born from a certain item her mother left behind. As Yukiji enters Mizuhozaka Girls’ Academy Tamakichi constantly puts in a troublesome appearance. Yukiji's hopes for a good school life looks dimmer and dimmer.

Middle Schooler Mei's parents have both passed away. The only family she has left in the world is her happy-go-lucky step father. Since her mom's passing she has had one question that she wanted to ask him...

From ANN:

Afghanistan is a young girl who works hard to eat every day, yet has bad luck and is frequently bullied by others. As she learns to stand up for herself, she begins to make new friends from other nations.

A single father takes pity on a drunken man outside his bar, only to be taunted by his equally adorable, and impudent young daughter. Little did they know that he will play a major part in their life.

How long can a 'childhood friendship' last? This is the story of those two who are close yet distant.

From Attractive Fascinante:

1. Faithless Lover
Keita, a very popular high-schooler, couldn’t understand the reason he always get dumped in his relationships. However on the night his friend, Shuuji, returned to town, his virginity was taken away by him. After weekly smooching with Shuuji, Keita soon realised he was in love with him and confessed. Shuuji rejected him immediately. Why did Shuuji reject him even though they have feelings for each other?

2. Finger Tips Reaching Out
Hideaki, the perfect, charismatic (and totally narcissistic) student council president of Tozawa High, is constantly annoyed by Sugimoto from class 3E. Sugimoto, on the other hand, pays zero attention to the President which only serves to annoy him even more.

3. Everything's Too Late
Kashiwai is bar-hopping with his colleagues when he is confessed to by a homo. Drunk, he accepts... but the next morning he can't remember anything. He wakes up with a naked stranger?!

4. Proof of Love
Kawamiya is head over heels about Suzuno. They're happily going out and very much in love - at least Kawamiya is... but who is "Haru"?

5. Omake Extra ~The Boyfriends' Room~

A sweet collection of one-shots, focused on each person's feelings toward the other, rather than complicated love triangles, etc.

Typical school boy Shibutani has always had trouble staying interested in his girlfriends, but when mild-mannered Yoshizumi transfers to his class, his interest is strangely piqued. As Shibutani tries to get to know his new classmate, he finds Yoshizumi to be awkward and even hostile. Other delightfully-crafted stories include a high school boy with a bizarre mask fetish deeply in lust with his dentist; a boyfriend's jealously over the close relationship between his lover and a best friend; and a couple who are overtly pouting over who should be on top in the bedroom.

Office worker Ubukata holds a secret admiration for Tsutsumi, but unreliable Ubukata doesn't think he has a chance with his super elite coworker. Until he finds out about Tsutsumi's secret problem...

Eliza's grandmother constantly destroys any approaching suitor before Eliza gets the chance to talk to any of them. Will this be her chance when she's alone and finds a cute boy in the forest with his pet... worm?

In order to win the heart of her dream boy, an obese girl joins forces with her cousin to lose weight… — An amusing take on the topic “obesity” and how the right motivation can work wonders from the author of Piano no mori and Hanada shônen-shi. -Bakaupdates Note: This is part of a collection of oneshots in the manga Gaki no Koro kara.

Aki is head over heels in love with a classmate but doesn't know how to confess.

From Monochrome Dreams:
Ichinose Tarou is at the age where he's really awkward about girls, but he's been chosen to perform along with a girl in a year end festival. His partner is Momozono Anne, the daughter of his father's boss, who seems to be in love with Tarou for some unknown reason. The two of them are supposed to build a snow demon and destroy it together at the festival, but Tarou would be happy to avoid Anne and do all the work alone. How will Tarou deal with this unwanted intruder in his life?

Aoi Spice, starts when young female student Ageha-chan meets popular idol singer Ren in the park where she works. But Ren, overdoing his look-how-evil-I-am mood, manages to handcuff her to him.
And then his dog eats the key.
Now the two of them have to live together until either they find a way to cut the handcuff's chain, or the dog...em...expulses the key. As hours pass, they become attracted to each other. Alas, everything has an end and they manage to get rid of the handcuffs...was that what they really wanted, after all?

Includes sidestories:
- Our Secret: Momoko thinks that, in this world, there must be feelings that cannot reach the other person. She could be wrong.
- Stealing my Heart: Kanako is suddenly dropped into an arranged marriage!
- Aishi Aiimashou: This sidestory covers the story of Shiawase, who is always thought of first by Omoiichi.

Living together with a boy under the same roof, approved by the parents!?

Story 1: Asa Chun!

The childhood friend she reunites with after 4 years has become super handsome!? And for one month, the two of them will be living together alone under the same roof!? Akane's daily life is going to be a string of heart-pounding situations and...!?

Story 2: Ai ni Ikuyo (I'll Come See You)

Yui who was so happy with her relationship with kouhei but unfortunately kouhei's family have gone bankrupt. He suddenly disappeared and the promise that they both kept to meet on the july 30th was broken. A year had passed and a letter came, saying it's kouhei's...

will she finally met up with the boy she loved and promised to one more time?

Story 3: Kinmoku Seishounen Syrup

Story 4: Ame Tomuchi (The Carrot and the Stick)

From Divine Sanctuary:

Ogata Aoi is in her second year of middle school and is the president of the student council. The middle school she attends is one of the best in the country and is called "AAA." Aoi goes there to meet her first love, but after a surprising meeting, she's finding out that her first love is a gang leader in the neighbor school, called "CCC" (lowest level). Maybe it's only a coincidence, and that gang leader and her first love just happen to have the same name. After all, they look completely different from each other. But now, Aoi wants to find more about this person...

This is a collection of seven oneshot stories.

Translated so far...

1) A Million Pound Love (100万ポンドの愛)
A 80 year-old lady asks a 20 year-old playboy to marry her as a last wish, in exchange for one million pounds.

2) A Fairytale Judas (お伽話のユダ)
The Nobles can fly, are as white as snow, maybe whiter and even brighter.

3) Noah's Spaceship (ノアの宇宙船)
The eighteen year old Junior is suddenly switched with the fourteen year old Junior.

4) Metal and the Bride (メタルと花嫁)
Jack is a talented man, or is he?

Her entire family likes them. Her friends like them, all the girls she knows likes them... but to Suguri, sweets are the worst! Just the mere smell of them induces her to vomit! So what is she supposed to do when she discovers that her crush, Murakami Ken, who supposedly hates them, is obsessed with them? He begs her not to tell anyone of his secret infatuation with sweets because it would ruin his 'manly' image and she agrees as long as he lets her work with him at the famous Igloo Bakery! Love sparks, rivals appear! See how Suguri overcomes her sugary malice in A Love for Sweet Things!