A coda to the OVA and novel of the same name, this six-chapter manga gives us a deeper glimpse into the back-stories of Rei Fukai, James Bukhar, Tomahawk John, and other members of the F.A.F.

However, some of the details about the characters' pasts and relationships appear to deviate from the sequence of events as seen in the anime. Therefore, this manga should only be read after having first watched the anime or read the novel, and treated as an alternate story of sorts.

Riki, the grandfather of Weed and father of Gin, was born a runt. He was fathered by Shiro and mothered by Yamabuki. Shiro`s owner, Gohei, pays no attention to Riki when he comes to pick a pup from the litter. Instead, Riki is never rehomed and becomes close to his mother. Unfortunately, Yamabuki`s true owner, who had been sick, was healthy enough to take her back. She didn`t feel she could handle two dogs, and decided that he would not take Riki in. Riki severely missed his mother, and one day set out to meet her. On his way, he is attacked by a pack of dogs. Hopelessly outnumbered, Riki tries to escape and falls into a river. Waking up, he learns that his father, Shiro, has rescued him. Riki had never seen his father, but had known his name. Shiro, on the other hand, didn`t know that Riki was his son and left before Riki could say anything. But, not before giving him a speech on being strong. Riki makes it his goal and constantly tries to get stronger. One day, a child named Daisuke takes a toy car (one children can ride in) through a roaded mountain pass with an incline. Riki, while traveling to see his mother, notices him racing down. A truck, not seeing Daisuke, hits the boy and sends him flying over the road railing. Afraid that he is dead, the driver moves on. Daisuke, although only bruised, is knocked out. Riki jumps onto a ledge and howls, hopeing someone would hear. Instead, the pack that attacked him heard him and came. After being abused, the pack came to hate humans and attacked Daisuke. Riki, in an effort to save him, fought against the dogs and succeeded in winning. Gohei and Shiro eventually showed up, and the pack ran off. Shiro finally found out that Riki was his son. Gohei, Shiro, and a few others head out to fight Akakabuto. Seeing this, Riki follows the van. Gohei intends to kill Akakabuto, but the bear is too strong. Gohei shot the bear in the eye, and the bullet became lodged in the beast`s brain. This made him go insane and, while biting Shiro, fall over a cliff. Riki witnessed all this, and was distraught when his father fell. These events set the stage for the future series, Ginga Nagareboshi Gin.

Ninjo and Soso are two galactic ninja agents , they arrive to Real City looking for a lost agent, but there nothing is what it seems

From MangaHelpers:

The Sengoku era gave birth to many historical legends. One of them is Naoe Kanetsuku, the brilliant military general of the Uesugi family. Together with Maeda Keiji, a legendary warrior on the battlefield, who become lifelong friends with each other, they carve out a piece of history in the most dangerous and volatile time in Japan’s history. The two men recall their beginnings and the journey they took to get to the accomplished position they now sit at. [vyc]

The "Bagmen Incidents", a series of murders. The perpetrator is the rumored girl clad in a sailor uniform whose face is concealed by a Gas Mask dubbed "Mask-san". One day, by a coincidence, that same Mask-san was seen by the young boy Watta. Furthermore, that face belongs to, of all people, his classmate...!? With the unprecedented heroine, Gas Mask Girl unfolds with suspense in battle and on campus. The curtain rises magnificently!!

At Matabi Academy, students are allowed to bring their pet cats to the dorms. For Yumi Hayakawa, whose favorite hobby is making clothes for her kitty Kansuke, Matabi seems like a sure bet. After all, nothing can possibly go wrong with her best friend at her side! But on the first day of school, the two find themselves face-to-face with a murderous demonic minion on campus! Will Yumi and Kansuke be able to defend themselves and their school against an ancient cat demon’s thirst for vengeance?

The fictional Japanese city named Sugomori City is built on reclaimed land. But as the years go by, the city's population is decreasing. One day, Sonosaki tells her classmate Katsuhira: "You have been selected to be a Kiznaiver." The Kizuna System, which allows Katsuhira to share his wounds, connects him to the classmates whose lives and personalities completely differ from his. The Kizuna System is an incomplete system for the implementation of world peace that connects people through wounds. All those who are connected to this system are called Kiznaivers. When one Kiznaiver is wounded, the system divides and transmits the wound among the other Kiznaivers.

Ryuunosuke's from an impressive clan... Or well, his secret is impressive, but he's not. After receiving a an unknown vampire doll from his sempai, his spilled blood wakes it up. With the soon-after death of his dear colleague, he also acquires a beautiful meat-eating girl. These two girls guide Ryuunosuke in controlling the monster that lurks within his blood while he tries to figure out the true reason for his existence.

The story centers around the young linguistic genius and university professor Testa. He is introduced by his senior, Sergeant Rossa, to the Allied Cryptanalysis Department. There, he is tasked to break the enemy werewolves' code, which the werewolves are using to encrypt their radio transmissions. Testa is astounded, as the only sound the encrypted code produces is the howling of a wolf. His research yields no results, and he resolves to capture a live werewolf for better cryptanalysis. After exhausting all possible means, he finally finds a female werewolf, Yonaga. A three-chapter adaptation of the winner of the Shonen Jump+ x Animax Anime Scenario Award, for which the artist, Akira Akatsuki, was a judge.

Spin-off of I Am a Hero, a love story. Kozue is about to break up with Ta-cchan while he plans to propose to her, right at that moment, the zombie apocalypse crushes down on Osaka. Now they have to find ways through the deadly chaos to each other.

Fujisawa Kenji is a troubled 17 year old with who was born in Yubari, Hokkaido. He rebelliously seeks to become a mob member for reasons kept in the dark. After dropping out of school, Kenji goes to his local Kumicho, who tells him to learn the trade from an elite yakuza named Kujo Eiji.

From: Easy Going Scans

Mu-Sang’s has a quest... He must find and kill every “Gwi” that has ever existed. He is determined and won’t let anything get in his way, not even the imperial army!
While traveling and searching for the remnants of Gwi, he meets a girl who also bears the same mark crossed out than he has. A fateful encounter? Were those two fated to meet? And why does he hold such a grudge against the “Gwi”? ...are all questions left to be answered!

Rally Vincent and Minnie-May Hopkins are two regular American girls. Regular American girls who own a gun shop and might have dabbled in prostitution, respectively. And who happen to be a crack shot and an explosives expert, respectively.

These might be odd skills for American girls, but these two happen to be Chicago's top bounty hunters. Rally can shoot the trigger off a gun from a good distance, and May generally wreaks havoc with explosions and cuteness. And together, with some very useful friends and associates, they make up the Gunsmith Cats.

Burst finds our ladies back at work, back in action, and... back in trouble.

"There are men who, on coming to places that women find unlivable, are all the more determined to find there a reason for living. These men epitomize grandeur."
Welcome to Gun Frontier.

Many years, years later, at the Mediterranean Sea, there's a legend about him. A young man with white skin comes from the deep sea, has appeared. By using the God of Death's dance, he's harvested many lives. His eyes are black like the starless night sky.

The story centers on Hello Kitty, who fights monsters born from wicked hearts as the superhero Ichigoman (Strawberryman). In addition to the Ichigoman, the project has also introduced the characters Dark Grapeman and Honey Momo (pictured with Ichigoman below). The new manga story will add a giant robot for Ichigo to pilot, as well as an alien countermeasures group known as "Freeze."

In the year 2199 a diving mecha gains consciousness, with the help of a Guardian of Atlantis crystal, and declares war on mankind. Believing that if humans are allowed to live, the Earth will die, the robot builds an army to cleanse the Earth of the human race. The robot, who calls himself Absolute, also learned how to use the “Light of Atlantis” power source to raise the city from the depths of the Atlantic ocean, and turn it into a robot city. There are humans that hold crystals as well, but it’s taking all the power they have just to keep themselves alive. For 100 years Absolute did everything in his power to wipe out the human race…until the day the first Guardian of Atlantis, Saturn, returned to Earth to reclaim his city. Upon arriving, Saturn reluctantly teams with the humans to try to defeat the mighty Absolute. Saturn and the other 5 Guardians, must find a way to reach New Atlantis, and destroy Absolute if they are to reclaim the city…and reclaim Earth.

The prequel to Otokojuku focusing on the early life of Edajima Heihachi, principal of Otokojuku. Ran for 10 volumes in Super Jump from 2003 to 2010. The story covers his university days, his war efforts, and much more about this mysterious man among men