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.

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.

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"...?!

From Fantasyshrine: Ever since he had sex with his childhood friend, Shinonome, the uptight Student Body VP, Yukimura, felt he was caught in a whirlwind. He found himself invaded by Shinonome in his own bedroom, in the library,everywhere…! Out of desperation, he found his only defense was to treat Shinonome coldly so he could keep his sanity intact. However, it only pushed Shinonome to go to the extreme…!! Will the head-strong, stubborn VP finally come to terms with his feelings…!? Sequel of Kirai ja nai kedo Part of Waruiko series: - I WANT TO BE NAUGHTY! / Warui Koto Shitai / - WARUI KOTO BAKKASHITE GOMENNASAI - KIRAI JA NAI KEDO - KOI JA NAI KEDO - MUJIHI NA OTOKO

In this screwball romantic comedy, Haruhi, a poor girl at a rich kids' school, is forced to repay an $80,000 debt by working for the school's swankiest, all-male club--as a boy! There, she discovers just how wealthy the six members are and how different the rich are from everybody else...

Includes 4 chapters of the story "Romantic Egoist" in various volumes, starring a pair of twins who play matchmaker with their fellow students, teachers and the like.

School girl is trained by a secret branch of the police to detect and to kill demons disguising themselves as humans.

Kim Tae Sik is a young man who would much rather spend his time at internet cafes, playing games, than going to work and filling out papers. After getting fired from his job, he ends up seeing a mouse cursor and follows it, leading him to a group of delinquents who earlier beat him up. Seeing how the cursor changes to a knife shape, Kim Tae Sik decides to fight the delinquents head on and ends up winning.

From there on, he chooses to follow the mouse cursor and wherever it leads him, as he believes that it has all the answers and keys to his purpose in life.

From Bunny's Scanlations:

Searching for info on drug selling, ring leader Leaguer gets found out. Luckily, Yakumo, a call boy who was present at the time, helps him. Hoping to get more info, Leauger wants to get close to Yakumo, but things are never as innocent as they seem.

The heartbreaking story of Mirai, a pushover type of guy, who is easly engaging in relationships with anyone who confessed to him to fall into dependency. Told from the POV of his childhood friend Hibira, who cares deeply for him.

From Easy Going Scans:

In a future devastated by war and desertification... is unexpectedly, a flower shop!

From Tokyopop:

Yume innocently uses her magic to help the people she encounters--soccer players, the wrongly incarcerated, or two young lovers wanting to see the moon on a cloudy night. And you can bet that Yume's magic leads to new adventures--and a few mishaps!

This is a 4-koma comedy about a young girl named Ichimatsu Kohina who got possessed by a low grade spirit called Kokkuri-san.

From Rain Over Paradise:

'Senpai, I want you to fall for me.'

When Hotaka, his junior at high school, suddenly confessed to him during their student days, Yuu felt so embarrassed that he gave him the brush-off. He was brusque with Hotaka, but even now, he regrets hurting his cute junior he cared about more than anyone.

However, when they happen to meet each other again after several years, Hotaka has turned into a devilish man who’s bent on seducing a drunk Yuu….

Young Gabriel Woods is about to discover that his dreams for an adventurous life will lead to something unimaginable. The door to the realm of the oldest race in the universe, GODS, is finally open to humans. From the mysterious dream eaters of hell to the legendary ocean realm of the sirens, the vast mysterious universe lay before him to explore, but Gabe must first prepare. Welcome all to the GRAND ACADEMY of OURANIA for GODS, where you will learn how to truly become a GOD. Is Gabe ready to face the powerful GODS of the new age, or will he regret wishing for more?