From Yen Press:
The air of celebration surrounding fifteen-year-old Oz Vessalius’s coming-of-age ceremony quickly turns to horror when he is condemned for a sin about which he knows nothing. He is thrown into an eternal prison known as the Abyss, from which there is no escape. There, he meets a young girl named Alice, who is not what she seems. Now that the relentless cogs of fate have begun to turn, will they lead only to crushing despair for Oz, or is there some shred of hope for him to grasp on to?

Goto Nagi has travelled to the southern island of Okitsushima, and ventures out to see Umi no Misaki, a striking cape jutting out into the ocean. But when he arrives, he finds that there is much more to this cape than a wondrous view. There is something peculiar about the cape, and about the island's inhabitants.

This adaptation focus on each heroine based on the Amagami visual novel.

V.1 - NANASAKI Ai
V.2 - MORISHIMA Haruka
V.3 - SAKURAI Rihoko

1-3) When part-timer Hiroto gives some food to the adorable child in the park, he doesn't imagine that the child's father will offer him a job. Mamoru is a very picky eater and his father Suguru needs a reliable housekeeper since his job as a pilot keeps him away for days at a time. The only rule is, no falling in love with Suguru, which should be easy, right? Right?!

4-5) Sonna Kimi ga Suki; Konna Boku demo Suki?
A pretty-boy model falls head over heels for an otaku with a 2D complex.

6) Moshi Makawari no Koi demo
Riku's twin sister fell in love with a guy from a very powerfull and rich family. The only Hitch is that Miku's boyfriend got an over-protecting brother, Kazuya. So when Miku and her lover eloping, Riku will do his best to save their love.

7) Sausage Suki Desu?
Extra for the first story

Read some slice of Asuka-chan's normal life. And see how interesting some daily activites of a cute high schooler girl can be.

From tethysdust at MangaHelpers:

Minaguchi Kaoru is nothing special. He's no good at sports or school, isn't in any clubs, and he's not popular. He has no friends and isn't even interested in any of the girls he knows. He's also teased due to the fact that he loves shoujo manga. Unlike the harem daydreams of his peers, he dreams of finding his true love. Unfortunately, a shinigami comes to kill him, simply because he's a "forever alone" sort of guy. When he gasps out his intention of embracing life with his final breaths, though, she takes it back! As long as he follows through on his intentions, he won't be killed.

To convince the shinigami that his plans are genuine, he declares that he will confess to the girl he likes, the very next day. Expecting failure with confessing to random girls in his school, he sends out love letters to four different girls. To his surprise, they all agree to be his girlfriend. Now, this shoujo-manga-loving guy has ended up in a kind of harem story, quadruple-timing four girls! Will he be able to stay involved enough with society to avoid an early death?

Genji and Kousaka meet six years later in high school. But is it only Genji who remembers what happened in the past between them? Furthermore, will they move forward into their relationship or will fall apart?

There is a Gothic-style mansion in a distant, rarely-visited part of Japan. There, the world's greatest surgeon, Naomitsu Madaraki, once lived but he hasn't come home in ages.
Instead, the professor's "daughter", Fran Madaraki, lives there with a large amount of her own ghoulish creations and her "younger sister" Veronica. She's a very unusual girl, what with the stitch patterns on her face and the giant bolts on either side of her head. Just as skilled at surgery as her father, and if you're willing to pay her price, she can do everything up to and including raising the dead. Fran believes that a life should be saved no matter the cost, and keep that in mind, since the results of her surgeries are rarely (if ever) pretty.

Yukinari Takase is a huge masochist who instantly takes a liking to Rion Tachibana, a menacing trap who just transferred into his class. After Rion believes Takase has uncovered his secret, he decides to make Takase his servant in order to keep his mouth shut.

From Summer Rain:

Momoko is a girl who likes learning about the trivia of life, and begins wondering about Haishima-kun who sits next to her in class and always dozes off. One day, they have a small exchange as they were asked to mark each other's quizzes, and she learns that Haishima isn't as scary as expected...?

Note: Because Shinjo Mayu stopped her job relationship with Shogakukan, she continued her incomplete manga in Asuka and called it Ai Ore! - Danshikou no Hime to Joshikou no Ouji This can be considered a continuation of Ai (w)o Utau Yori Ore ni Oborero! or even as a second series.

From Wingtip Cafe:
Suzu, an ordinary girl who possess extra-ordinary power to summon demons, was left with a flute, the only keepsake of her disappearing 'Father'. In the flute, dwelt the guardian spirit who responds to her plea in danger.

Spoiled rich girl Yao decides to join the Miami police force to enjoy car chases, gunfights and wanton destruction. The psychotic and not-too-bright girl is partnered with Lu Amano, the soft-spoken and sharp-tongued daughter of the police chief. Together the dirty duo clean up the streets of Miami and take on a mysterious crime syndicate known only as 'The Organization'.

A series of oneshots

1) Ookami Shounen
Chisato loves strong, dangerous and cool guys. That's why Ikehara, who hates dogs and confesses to her, is no good! But then, Ikehara tells Chisato his secret??!

2) White White
It?s Christmas Eve and Saori goes through a blizzard to give homework to her crush Masa-kun. When Masa-kun's girlfriend cancels Saori gets to spend the day with him.

3) Together With You
Misa is dating her childhood friend but when things don't go her way do they split up for good?

4) Pig

5) Spider's Thread

6) START

From Yen Press:
At the invitation of an old school friend, introverted high-school student Mikado Ryuugamine, yearning for a life less ordinary, makes his way to Tokyo. His destination: Ikebukuro, a hotbed of madmen living most unusual lives. On his first day there, Mikado encounters a cast of characters so colorful, the rich hues of his rural hometown pale in comparison! And as if the naive stalker chick, the high school senior obsessed with the rather creepy object of his affections, the hikikomori genius doctor, the hedonistic information dealer, the strongest man in all of Ikebukuro weren’t enough…Mikado also chances upon a sight that leaves him rubbing his eyes and scratching his head — the Black Biker, who is black as night from bodysuit to license plate, soundlessly weaving through the streets like a figure out of an urban legend. Who is this “Headless Rider” on the jet-black metal steed!? And why does it seem like Mikado’s already gotten himself neck-deep in the insanity that is the norm in his new home!?

1st Arc: Durarara!! (4 Volumes)
2nd Arc: Saika Arc (3 Volumes)
3rd Arc: Yellow Flag Orchestra (3 Volumes)
4th Arc: Akane Arc (still ongoing)

This is a story about two friends, from nearly the beginning to almost the end of their lives, who happen to love each other.

Tatsuya and Junichi are in 5th grade and their music teacher is a pedophile. One day the music teacher has a request for Yumi, a girl who uses him to get expensive gifts. He wants her to get Tatsuya into the music room so he can be with him. Junichi recently confessed his feelings for Yumi and she decides to use him as bait to get Tatsuya to go to the music room. Junichi and Tatsuya's future does not look good...

Note: Only chapter 1 of volume 1 and chapter 7 of volume 2 is shotacon. Reading chapter 1 is almost necessary for the story and is not very explicit, but chapter 7 of volume 2 is an extra/one-shot and can be skipped over completely for those who dislike shota.

There is fighting going on at a high school due to a power struggle for control. A beautiful young girl, the granddaughter of the director, requests help from a tough silly young man renowned for his genius fighting style. At the same time, other beautiful girls appear from the same high school who also want him as a teacher. Will he help and if so, which side will he choose to support? Or will he just show his true face with his bad boy ways?

From Chibi Manga:

The most popular group of idols.
Hina loves the leader of the group, Chiaki. After their representation, she was so excited that she came to see Chiaki. And they kissed!! Then, they started going out together. But Chiaki designated her as his "pet". Hina is so happy but will she support being only a "pet"...?!

A one-shot webcomic with the existence of Santa as its theme.

From Moi-xRyu Scanlations:

This spring, Tokyo TV's newly employed announcer Fukuro was given the task to gather information & do a close report on the infamous hunk of the professional baseball world; Shiratori Reiichi. Given this important opportunity Fukuro is determined to do his best! However, the following morning he wakes up to a stark naked Shiratori sleeping beside him, trouble ensues!

The demanding and selfish Shiratori with the hard working and Timid Fukuro! Watch as their love story unfolds.