From Tokyopop:

Hack//4 Koma" is a four-panel (a.k.a. Yonkoma) manga series set in the popular multimedia world of .Hack. Most of the 4 Koma are filled with gags and parodies centering mostly around the main characters of the first (Kite, BlackRose, Helba, etc) and second (Haseo, Atoli, etc) series of ".Hack" videogame

Bronte is running away from a failed wedding ceremony in the rain when she finds a cabin for shelter, occupied by a blood-soaked man with Gold eyes, who claims he just killed a man. His name is Mars West, and on impulse he kisses her, just as the police come to drag him away.

Five years later Bronte comes to New York to see Mars, who spent two years in prison for the murder it turns out he didn't commit. Then things get strange…

This is a soap opera of the highest order, with machinations and manipulations that only the very rich could get away with…

Based on Ann Major's novel, "Secret Child".

Fate/Zero takes place ten years before the events in Fate/Stay Night, detailing the Fourth Holy Grail War in Fuyuki City.

Sengawa's day job is as an accountant working for the police. But at night, he transforms into a ruthless assassin bringing death to anyone who deserves it. Those who have been wronged and whose grievances the police can't - or won't - listen to, turn to The Man With A Thousand Guns to avenge their suffering.

Contains 5 stories: 1. ...Curtain. Living purely together with Sensei: Hiyori Okamura is a new mathematics teacher at a high school she graduated from. She still loves Shibasaki, a chemistry teacher who she loved as a student. One day, it happened that Hiyori couldn't use her room, so she moved to Shibasaki's room in the same apartment house, and began to live there. A curtain divided the room in two, and Hiyori and Shibasaki...!? 2. Love Duet: Honda Ema works with and is attracted towards Sawaki Koutaro. Honda plays the Piano and is taught by Sawakis little sister. But due to an accident Sawaki will be teaching her. 3. Sweet days for you, too 4. Impassioned Drawing 5. Entreaty Guidance

From Storm in Heaven:

Judges are the messengers of the Central Government, sent out to punish delinquent cities. They have the ability to control programmed "seeds", causing explosive growth. After a disease breaks out among the "Children of Babel", those Judges who're given power through Central's research, Central requires the data of a natural Judge like Sion. However, Central is also interested in the legend of the "Heavenly City", which Sion is named after; what could their true purpose be?

Etou Kai may look like a squeaky-clean kid, but the Greater Kanto Narcotics Control Division's new investigator hides a violent alter ego and a dangerous past.

With his stoic partner Kurabayashi Hal, Kai is assigned to track down and stop the distribution of Dragon Speed, a dangerous new drug. But Ryuugen, the syndicate trafficking the drug, is almost impossible to infiltrate. Add street violence and a jurisdiction war with the Meguro Police into the mix, and it looks like Kai's in for some very long days at the office.

From Shoujo Crusade:

Sayu was quite surprised when the popular Yano-senpai told her that he likes her. Nevertheless, she is still happy to go out with him. But when others start asking why would Yano-senpai want to go out with someone like her, Sayu can’t help but also wonder why...

From Tokyopop:

Three years after the popular video game The World was shut down, Tokio Kuryuu cannot wait for The World R:X to come out. Unfortunately for him, he forgets to reserve a copy and finds himself with no access to the game. That is, until a mysterious new transfer student forces him into the game and makes him her servant.

G.U.+ follows the player Haseo, a powerful PKKer known as "The Terror of Death". Haseo is obsessed with an infamous PKer known only as "Tri-Edge" who attacked a close friend of his sometime in the past. The manga details Haseo's search for Tri-Edge, and his eventual inclusion in a mysterious group known as "G.U."


Back story of the ps2 game (same title)
In 2015 a fire at the main CC Corp. building resulted in the loss of a lot of data, and The World was forced to shut down. By splicing in data from what would have been another game, CC Corp was able to rebuild the game system. The next year, "The World R:2" was released, but many old players objected because they were unable to bring over their old characters. However, many new users were drawn in by the new style, and over 12 million copies were sold. Though not a match for the previous version's 20 million users, it became the top-selling netgame on the market." As a result of the new world, four major clans (Kestrel, Lunar Tree, Canard, and Raven) came to power. The clans actions shape 'The World', and most players end up taking one side or another during conflicts.

.hack//Alcor takes place in the online game 'The World'. Nanase is a shy and naive girl belonging to the newbie helping guild 'Canard'. All she wants is to be with Silabus, the guild master whom she has deep admiration for. However, when the guild members are targeted by player killers (or PKs) from the guild Kestrel, will Nanase be able to brave the situation?

"Gokko" means playing a game of make-believe. One day, a boy called Ikei comes to Fuyuko's place and claims to be her brother. She doesn't believe him, however she allows him to stay at her house. As a wannabe future actress she then starts playing "Gokko" with him to improve her acting skills. Where will it lead them? (taken from Wataame Shoujo)

　Our protagonist, Inoue Konoha is still being led around by his senpai, the Literature Club's President, self-acclaimed "Literature Girl" who loves stories so much that she can eat them, Amano Touko.

　One day, someone put in the Literature Club's "Love Consultation Post Box" a bunch of paper scraps that have the words like "Hate", "Ghost is" and a bunch of puzzling numbers on them. Calling the act as "picking a fight with the Literature Club", Touko once again got Konoha involved in her investigation; but when they found the culprit, this girl turned toward them, smile, then said "I'm already dead."

　This is the second arc of the popular bitter & sweet school mystery series.

Eru Yamada can't seem to get away from the supernatural. She's being stalked by a vampire. Her teacher is a werewolf, who also happens to think she belongs to him! As if that wasn't enough, yet another boy with supernatural powers shows up, trying to get her to fall for him, and she winds up with a rival in love who has dangerous powers as well!

Takuma Miyabe is a boy from an island who moved to Tokyo because his island doesn't have a high school there. However, the ratio of male and female is 1:9. There are too many female students in his class, and as a result, they "flirt" and torture the still innocent Takuma.

1.8 Square Meter of Secret: A girl sneaks into her boyfriend's closet. During that time she overhears a conversation between her lover and her best friend. This makes her start to wonder.. Which one of them does she love more - her current lover or her best friend?

Innocent Fairytale:

Project X-mas:

My Beloved Goddess Rina:

From Chibi Manga: Plainful child. Akari is really attracted by the popular Unit of idols "Flower”. Then Akari get the chance to sing at the Flower's center?! But what is the secret that Flower keep…?!

From Wingtip Cafe: Ellen moves to a new house in the country side. There she meets a spunky green-haired elf and learns an alarming truth. She’s a half fairy! plus 3 side stories! • The Children of Planet A - Paula's father is a novelist. One day, she comes across a story that he had written long ago and took the words from the story into her life. Plus two other stories

From Lovers Dream: It's about a girl who falls in love with her little brother. She thinks it's bad, but the two of them learn that they are not related by blood.

When he was younger, Takeshi promised to come to the aid of a "cute girl" in his calligraphy class that he had a crush on. Since then he has never strayed from Mako's side. Mako sees Takeshi as "cute as a stupid dog". Add in third wheel friend Honda, along with many other typical plots for a school romance and you have a story.