Rain Jewlitt, known as the Methuselah, is a spaced-out, immortal, 624-year-old man dressed in priest's clothes. He's got eternal youth and a large price on his head—put there by those questing after the secret of his immortality.

Machika Balfaltin is a tomboyish, energetic 14-year-old girl who, upon the death of her grandfather, sets out to kill Methuselah, the one bounty her assassin grandfather, Zol the Grim Reaper, couldn't kill. Instead, however, Machika ends up being saved by Rain again and again from other aspiring bounty hunters attacking them both.

Sound like the beginnings of an odd relationship? You won't believe where their journey takes them...

'S' is a known as a bully caretaker, who avenges her bullied clients -- for a price, of course.

However, in reality, 'S' is a nerd named Kang Song Ih, with a twin brother named Kang Ah Eul, whom she loves above anything. Ah Eul attends Chungha High School, a famous and expensive school, but over winter break, he attempts to commit suicide. Song Ih, determined to understand why her brother tried to kill himself, attends Chungha High School, pretending to be Ah Eul -- uncovering the reasons why Ah Eul was driven to suicide, including one mysteriously handsome but "bad" guy named Suh Ga Yoon.

Read as you follow her life while staying in an All-Boy's school and living in a dorm -- with a male roommate, who happens to be a famous singer and someone she as "S" had once nearly beat up.

Watch out! Whoever bothers "S"'s brother, prepare to face her!

Kobayakawa Sena (Eyeshield 21) meets Monkey D Luffy (One Piece), Naruto, Son Goku (Dragonball), Bobobo (Bobobo-bo Bo-bobo), and Toujo Aya (Ichigo 100%) in this short adventure that serves as an advertisement for the game with the same name.

From Forever More: After his parents were killed in an accident, Yayoi assumed their hundred-million yen debt. He was being pursued by collectors when a mysterious man, Kazu, appeared before him and offered to take on the debt for him if he would become Kazu's...

A slacker high-school student gets pulled into a world where he is named the "Dungeon Master" and can control everything that happens. He can even make it rain money! It's in this world that he meets a young, traumatized girl who's memories have been erased. With her help, he creates a new game world to escape his boring school life. Everything seems to be going fine until they encounter a lethal bug in the game's programming.

Satoyama Katsuki is a carefree 15 year-old high school kid, and a pretty lazy one at that. However, he secretly has a crush on a girl who happens to share his name: Mizutani Katsuki. Upon finding out that Mizutani's father used to be a pro-boxer, and she herself infatuated with the sport, he reluctantly joins a boxing gym in order to impress Mizutani. Satoyama is quick to find out he may have the blood of a genius boxer running through his veins...

Tsuna comes home one day, only to be greeted by a little baby mafioso who apparently is his new home tutor. His job is to guide Tsuna into his role as the 10th Boss of the Vongola mafia family. With the help of all his new friends and an array of special items such as the "Dying Will Bullet", he might just be able to do it.

This man's name is Gota Araki. Today he begins working as a teacher at Kyokuran High School in the city of Tachibana. His hobbies are fitness and clipping pictures from adult magazines. But another man has been sent to teach at this high school and that man's name is...

King Panda is dead and the Upper Yard of the Zoo is left without a ruler. The animals of the East jockey for domination while the peaceful animals of the West prepare for the oncoming war. It's the cutest and funniest animal civil war you'll ever see!

Fuyuki is an anti-terrorism specialist for a security company. His current assignment is as a bodyguard for elite company president Kagami. This is no ordinary assignment, however. Kagami’s not looking for protection from Fuyuki, he’s looking for love, and his constant expressions of affection have Kagami’s nerves stretched to the breaking point.

Kirara hunts Kagari the White Wolf, who is believed to have killed villagers, travelers, and her older brother.

From Yen Press

Soon after his birth as a Nobody, Roxas joins the mysterious Organization XIII, knowing nothing of his identity. With the help of Axel, another member of the Organization, and the mysterious No. 14, who is also missing her memories, Roxas slowly begins to learn what it takes to be a part of Organization XIII…and what it means to have a heart.

One day, high school girl Sonoko forgets something so she goes back to get it. She glances out the window and sees a boy in the schoolyard, surrounded by unconscious and bleeding bodies!
The boy is Narusawa, and blood runs down his cheek, and he has a dangerous look in his eye. He is one of the toughest guys in the school, and had beaten up the guys at his feet. He senses Sonoko looking at him and turns to her.
Sonoko's school is co-ed, but the girls only have classes with girls, and guys with guys. At this school, most of the guys are the loud, rude, dangerous, violent gang-member type. Most of the girls know to stay far away from them.
But, things are about to change when this kind of boy asks her to be his girlfriend--the dangerous Narusawa-kun himself! He waits for Sonoko after school and follows her around. He seems to really like her! What should she do?
Narusawa has a different side to him that he is willing to share with Sonoko. He can be kind and funny. What a strange couple they would make! There are a lot of obstacles in their path to love. Narusawa is willing to tackle them, but can Sonoko face her own fears?

Oneshot/Chapter 0 : Vulcan Markovic lives in a small fishing village in Croatia. He has only two things on his mind--designer goods and losing his virginity. When an indescribably beautiful girl shows up asking for directions to Heaven's Gate, Vulcan takes his first step into "thrilling world-salvation action!!"
Chapter 1 : Main chara switched to another apostle (a monk).
Chapter 2 : On to another, with recurring previous main chara.

From Endless Abyss:

The Law of Ueki plus takes place 2 years after the end of The Law of Ueki, everyone has gone there own way and life has become peaceful again until one day Ueki saves a dog only to stumble upon a plot to steal the memories from all the people of earth. Ueki as the only person who did not have his memories taken, must go into a new world and retrieve the stolen memories where new allies, foes and powers await.

A group of powerful beings called tenkaijin are holding a special tournament. The rules of the game--each tenkaijin selects a kid in junior high to be his champion and grants him a special power. The kids take each other on in heated battle, but if they hurt innocent bystanders, then they lose one of their natural-given abilities. Every time they win a battle, they gain a new ability. The ultimate winner of the tournament is granted any power of his choosing, and the tenkajin who he represents succeeds in becoming the next god. Kosuke Ueki has been chosen to fight in the tournament. His special power--the ability to turn garbage into trees.

Strippers try to stop a zombie infestation.

Mazinger Angels chronicles the adventures of four women who pilot giant robots in the Mazinger vein. The concept is a spoof on the late 70's and early 80's popular TV series Charlie's Angels.

Three of the robots, Aphrodite A, Diana A and Minerva X are from the original Mazinger Z series, while Venus A is from the Great Mazinger series. Their pilots are also traditional characters from Go Nagai's universe, Sayaka Yumi and Jun Hono from Mazinger Z and Great Mazinger respectively, and Hikaru Makiba and Maria Fleed from Grendizer.

The style of the manga highlights the sex appeal of both the characters and the mechas, sometimes similarly to the way Aika's female characters are shown. (taken from wikipedia)

From CPM:

An alien armada from Jupiter has amassed enough power to destroy all of Earth's defences. Earth's final hope lies in the Space Battleship Nadesico, a ship created using recently discovered extraterrestrial technology.
Can the Nadesico's rag-tag crew overcome their idiosyncrasies and defeat the alien fleet, or will Earth's last hope be lost?

The manga differs greatly from the anime

[From Viz]:

Ginta Toramizu is a 14-year-old kid who doesn't have a lot going for him: he's near-sighted, doesn't do well in school, sucks at sports, and to top it off--he's short! But Ginta is a dreamer and has had the same dream 102 times, always in the same fantasy world, where he is a hero blessed with all the abilities he lacks in real life.

Then one day a supernatural figure appears at Ginta's school and summons him to a mysterious and exciting new world! In this strange universe filled with magic and wonder, he is strong, tough, agile--and he can see without his glasses! Thus, Ginta begins a mystical quest in search of the magical items known as "ÄRMS," one of which may have the power to send him home. Joining him on this epic journey are his companion Jack and the valuable living, talking, mustachioed iron-ball weapon known as "Babbo," which everyone wants but, it seems, only Ginta can possess!