ANN: Black-haired girl x bicycle = long distance romantic comedy! From Baka-Updates: A 18-year old-Japanese otaku runs into a cute Chinese cyclist. Will the Chinese he learned from anime be enough to communicate?

Synn is a hard-luck high school student. One day, he becomes student council president. But his job as president includes getting rid of mazoku (denizens of hell) that appear in his town as well. Also, he is informed that his father is the Maou (king of demons) and he is supposed to succeed to his position in the future. He has to fight against mazoku as the president, but his father is the leader of those mazoku. Well, will he be able to keep it a secret and enjoy his school life? Based on the Twinkle Crusaders visual novel/eroge.

We find Chunwha, a girly looking man, in a world different from his own... There he will struggle to find his way back while encountering the many different inhabitants of the new world including elves, dwarves, and even mages! As he grows in strength and spirit, the mangaka creates fascinating situations with his friends and enemies that moves past the simple confrontation of the antagonist vs the protagonist. To find out what funny fate is in store for our hero, follow Id in a fantastic adventure, exploring a world where anything is possible and he is constantly mistaken for a girl!

Mist Story is a one volume horror anthology by Go Nagai from 1992.

It's 2071 and Earth as we know it is in ruins ruled by Wild Gods, the "Aragamis". Set after half a year in the Original Game Story, Kagami Ryo, Leader of Far East Branch's Team One, travels from Finland to return to what was formerly called Japan.

Abiding by his father's will, Shougo was transferred into an academy where many young girls attend. It appears as though his younger sister (separated from him at birth) also attends this academy, and that she is trying to get closer to him without letting know him who she actually is. Problem is, Shougo seems to be popular with the other girls as well! Can Shougo "properly" reunite with his little sister and while making a girlfriend at the same time?!

From CPM: Narue is an adorable schoolgirl with a secret. She's really an alien with powers right out of a sci-fi comic! But growing up is never easy, and sometimes it doesn't help when you're from outer space. Join our spunky heroine as she faces androids, alien invasions, and (scariest of all) her very first date!

Updating

[based on chapter one] Lou Jie is a legendary street basketball player. His Uncle, a shady character, desperately wants him to go to the best sports college in China so that one day Lou Jie can play in the NBA. Lou Jie has plans that don't include basketball, however fate may have something else in mind... Note: A couple of chinese sites has up to chapter 7.

From MangaHelpers: Inuzuka Taromaru is a first year high school student who looks like a delinquent. One evening, while he's at his part-time job, he ends up with a white-feathered arrow through his head! He's told that this arrow means he has been chosen as the sacrifice for "Inugami-Hime," who lives on top of the nearby mountain. However, this mysterious "Inugami-Hime" turns out to be a cute girl who has chosen him to be her servant, not her sacrifice. Their life together is just beginning! [tethysdust]

The story takes places in 17th century, France. Belmonde, a son of a noble father and a deceased witch mother, was born and raised in a cloister's basement. He is the master of an underground prison and has the rights to use any means to bring out confessions from his prisoners, namely by using "torture". With his eye, he is able to see through them... That is, if they do not comply to his questions. Summary based on the beginning chapters of this manga.

One day, Natsuto found a loli near his house and it turns out she's a Holy Loli that is in a mission to eradicate the demons that escape from the Chaos Realms and as well as find the Key that can summon demons. Source: (Kisu KMS)

Set in the Daiouyama Prefecture High School, a school with over 3000 students. The Student Council Empress decides that small clubs are a blight on the schools resources, and that they should be forcibly merged into one club. Which of course throws four very different clubs and girls with different interests into the same room…

A mystery/action plot: in the 13 hours 13 children spent in space, what had happened?? Not enough of the series has been released to describe it properly. It starts off 8 years after the spaceship incident, centered around one of the 13 children named Bono U. Meyer. He has an IQ of 240 and it seems people who are close to him have [coincidentally, perhaps?] been driven clinically insane. What is going on?

An innocent young man, Ikuroo, has a parasite known as Baoh implanted in his brain by an evil organization, Doress. The parasite makes him nearly immortal and gives him the ability to transform into a really powerful beastie when he's in trouble. Doress intends to use him in some sort of ploy for world domination. But while they're moving him around, a young psychic girl, Sumire (who's also being held by the organization), sets him free, and the two escape together. Of course, Dr. Kasuminome is the mad scientist behind the whole thing, and he isn't about to let his test subject get away... and he has everything from superpowered lackeys to a small army at his disposal.

The protagonist is your average, everyday, Korean school student. That is, if not for his obsession that aliens live on Earth disguised as humans. Much to his surprise, he was right, the aliens play a game called "Avatar" where they take human form and live human lives. And because of a glitch he caused in their system, now his very life could be at risk. Now he needs the protection of an Admin of the "Avatar game" or else he could very well die!

Minori is the manager of her high school's baseball club, which has been defunct up until five years ago. Even now, it's a little rough, since there currently are no seniors in the club at all! None of the second year players know why the club closed so many years ago, or about the baseball history all their fathers share...

A short prequel to Shounan Jun'ai Gumi and pre-prequel to GTO about how Onizuka Eikichi and Danma Ryuuji meet. Pantyshots and gratuitous asskicking galore. This manga was added as an add-in to Shounan Jun'ai Gumi and later rereleased separately. Some time later GTO came out and the two prequels became more famous.

From MangaHelpers: Shibata Youichi is an ordinary highschooler, but one day he runs into a mysterious heroine! The cute girl knows his name, and (as in a stereotypical anime) she's an alien who needs him to help save her people! Soon enough, Youichi finds out that this situation was too good to be true... The girl, named Kyara, does represent aliens, but her people are actually interested in Japanese manga/anime/game culture. They want to use his home as a base and his brain as a measuring tool of the level of appeal of their heroines! [tethysdust]

This was the root of everything, the debut work of Takahashi sensei, a nostalgic memory. The story of Genzo Wakabayashi and a boy named Tsubasa Taro.

Genzo Wkabayashi and Taro Misaki invite, the creator of Captain Tsubasa series, to travel in Europe.

Updating

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

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? An adaptation of Little Red Riding Hood