About a boy of thirteen years who always tries to be a hero and for various reasons are involved with monsters, ending in his death, but it revived with the help a little thing (one might say that is the predecessor of innocence) and now must fight the Count ancient.

Naruyuki Touya, young student, arrives at Amagiri Gakuen, his new highschool. He finds himself on the quay of the station faced to a robot out of control and is attacked by a girl and then a classmate.
Who are they? How come the girl knows his father?
And what is the connection with him and this highschool?

Kai was living a peaceful and secluded life with his special martial arts teacher Gankutsuo, until the day he rescued a beautiful girl, Lee Shuurei, who was tumbling down a waterfall. He has no idea what she means when she asks about a "Tenraimon", but Kai is soon drawn into her problems when her pursuers arrive. Meeting her will change the course of Kai's life!

A shape-shifter wolf who was once a human, but became a demi-immortal when his lover betrayed and murdered him, adopted an orphaned boy, who is now a young man. They travel together, exorcising evil spirits and demons. Trouble follows and finds them often, but they always manage to come out on the other side, pretty much intact.

From a place in a different dimension from Earth, a world called 'Lote'. It is a world of androids, comprising of a queen, princess, rook, bishop, and knights under the command of a main computer. However, one of the main computer, the princess suddenly disappeared and the world of Lote falls into chaos. In order to find the princess, the head of secretary, Dion, travels to our world, Earth. There, he meets a high school student SeoYoon, and from this incident the life of SeoYoon takes a 180 degree turn...!! - Translated by Grumpy from Naver Manhwa

From Viz:
It is the middle of the 21st century and Tokyo is expanding more and more, filling Tokyo Bay with landfill to make room for the bursting population. But suddenly Tokyo suffers one of its greatest earthquakes, and the landfill liquefies, creating untold damage in the newly-made urban area. The members of Self-Defense Force Rescue Squad Four are sent to help. But what they dig up is a plot of murder and destruction--one that wipes out nearly the entire squad and leaves its two surviving members, the fierce Rei and her cool, handsome partner Uozumi, in a fight for their lives.

There is only one place where they can find the work that keeps them alive, and the support so they can start uncovering the mystery that killed their squad: that's in the south-Shinjuku bar called Chicago. As the earthquake levels Japan's largest city and capital and leaves countless dead, rescue workers, Rei and Uozumi, search for survivors amidst the rubble of Bay District D only to find a mysterious string of dead bodies--bodies with bullet holes. Without warning, the pair is under fire from the air as a hail of gunfire rains down. Are these the killers, and if so, what is their purpose? Barely escaping with their lives, Rei and Uozumi discover that their squad is listed only as "collateral damage" and their records wiped clean.

Michi is a girl given extraordinary power by her fairy godmother Yaaba...the power to transform into the beautiful and heroic Cinderella Knight. With these powers, she seeks to protect the man she loves from afar, the handsome Prince Emilio of Ballade, from the evil Spider Corps of the organization "MURDER"

The Chrono Code, the key to a powerful weapon in the future, has been sent to 1994 and resides inside Ji Soo Jung. A gifted martial artist and the hope of her Kendo team in the upcoming national championships, Ji Soo Jung has no memory of her life prior to 4 years ago, and is searching for the lost brother she knows nothing about. She is catapulted into the middle of a violent struggle for the Chrono Code when different factions from the future start to fight over her, and she has no idea who is really a friend and who is really an enemy.

Once Demons and Humans were at war, and special warriors were needed to defend humans. Now a peace treaty exists between demons and humans. To uphold it human warriors now protect demons from other predatory demons. The Yosogi family is given this thankless task--and it's heir is young Akira, who can't even stand up against his older sister. But only Akira can sense the presence of demons, so he must become the next Demon Defender. But their grandfather has brought in a shy girl named Matsuri--and Akira is warned in a dream he must protect her at all costs!

From Dan of Population GO: Based off of The Song of the Nibelungs comes a manga about bravery, honor, and heroism. As the last of his people, Siegfried will stop at nothing until he becomes a legendary knight whose story will last eternity. If his legend lives on forever, then so will the memory of his people...and that is his sole reason for going on. 

From Fallen Syndicate:

A stylish suspense action manga depicting teenage battles!

It is the year 4088. It has been over one thousand years since the Crisis of Systems (Lost Property), which resulted in the destruction of four planetary systems, leaving only a single inhabitable planet, Zion. Mankind is forced to live in space colonies, since that one planet is constantly being invaded by alien life forms that have come to be known as Victim.

To stop the aliens and to allow people to land on Zion, mankind has developed the astronomical humanoid weapons, Ingrids, also known as Goddesses. G.O.A. (Goddess Operation Academy) is a school dedicated to the training of young men to pilot these Ingrids...

Chris Redfield and Jill Valentine arrive in a remote Russian village to check on rumors that a wolf infected with the T-Virus had attacked its inhabitants. It wasn't long before the two ex-STARS officers found them battling against the villagers, now turned into zombies.

The protagonist is a descendant of Pcell. This story happens a long time after the events of Blame!. This young silicon creature knows well the havoc that Killy brought and decides to move towards the end of the megastructure, to look for him. NOTE: This oneshot is actually chapter 8 of Blame Gakuen! and So On

Set in 2194 AD, China, which is now a prosperous, super-modern country. The characters are mostly reincarnations of warriors from the 3 Kingdoms period. The story begins in Shin Yokohama with main chara Todoroki Ranshirou driving around & causing a ruckus with his bousouzoku called Yokohama Road Stars, when he gets a mysterious package from his father. Soon after he's attacked by Blades and makes an astonishing self-discovery... that he's the reincarnation of Sun Ce!

The much-awaited sequel to BLAME! follows a man, called a Dismantler, who is in charge of sub-dividing the nexus towers that incurr Safeguard interference upon its detection of humans without the net terminal genes. Although humans are once again able to reside in the Net sphere, the Safeguard are still a threat. The Dismantler or NSE, or Net sphere engineer, goes on a journey to aid mankind in their survival. NOTE: This oneshot is actually chapter 6 of Blame Gakuen! and So On

From: Easy Going Scans

The Van Helsing Church Order is bent on destroying all supernatural creatures, as well as anyone else who gets in their way. However, a certain silver-haired man and red-haired vampire are not waiting for the Church to come to them! During their latest attack on a Van Helsing "cleansing" squad, they inadvertently save the life of a human being..

From MangaHelpers:
When an enemy explosion leaves private military soldier Terawaki Ryo nearly dead, a secret organization rebuilds his body using the research they have done in human revivals. Unfortunately for him, the technology only allows him to come back in the form of a teenage girl. His new identity, Shibahara Kyoko, leaves him distraught as his frail body doesn’t allow for the combat skills he used to have or even pick up heavy artillery he used in the combat field. Kyoko is assigned to protect a prestigious academy where daughters of powerful leaders attend since the girls’ presence makes it a hotspot for terrorists to attack and blackmail the people in power. Led by his former commander and mentor, Major Honjo who has also been reborn as Ryo, was a beautiful teenage girl named Chujo Shizuko, and the pair work together as anti-terrorist teenage school girls.

In order to determine which hot spring is to be the top overall, all of the hot springs within the region enter an unofficial tournament. The tournament is simple battle of capturing the enemy's flag, but the battle itself goes beyond any human measure. It is customary for a female to enter these battles. Carrying their pride and their flag, their only objective is to defeat their opponent. Hence they are commonly called "Fighting Spring Princesses." Kikko, the Fighting Spring Princess of the Aizen Hot Spring Temple, is an eccentric, hot-blooded person who is going to have her debut battle. Sit back and enjoy the story of Kikko's path to becoming queen of all hotsprings!

From Wikipedia:

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.