This story is about two unique students. One is a infamous delinquent who wants to be a be a gentle person and the other is a smart class president who wants to party and have fun. What do they have in common? They are superheros/angels who fight against monsters in the name of justice!

From SCX-Scans:

Angela wakes up in an abandoned warehouse. Confused and dazed, she has no memory of her past or any concrete idea about how she got there. Through a series of seemingly inconceivable events, Angela learns that she has been chosen as the next vessel for the great demon queen. The only thing preventing the queen from taking over her mind and body is her virginity. Will Angela be able to avoid temptation or will the Demon Queen Lilion be unleashed to ravish the Earth?

From Blissful Sin:

The Waterfalls of Lowen Petergillian -
They are the waters at the end of the world above. Every river, every lake, every ocean; all water arrives here, Protecting the ends of the world and the city which longs for it, Klinia Roe. On a green hill lies the representation of peace and harmony. The world is ruled by the Higher Prince, Al El. His brother, Serlhon, and an adventurer from the world below begin their journey.
Serlhon admires Ashrei and believes that he is the only one who can free him from monotony. Exactly one year ago, Ashrei and a man-beast, Hephaistos, arrived in this world. Different from the Klinia people and Serlhon, Ashrei Rodd possesses dark hair and eyes of a mysterious light.
During his journey with the strong and manly Ashrei, how will Serlhon grow? What secrets does Ashrei hide?

The story involves human mutations called "Diclonius", who grow horns on their heads and possess telekinetic powers, in the form of invisible "arms" called vectors.
The tendency for violence among Diclonii varies among characters. Certain scientists contain them in a Facility in cells, where they are subject to inhumane experiments to test their abilities or where they await execution for being too dangerous.
An infectious virus is also associated with the mutation. This virus is spread through non-lethal contact with the vectors of a diclonius.
The main non-mutant character in the story is Kouta, who ends up becoming increasingly involved with these dicloniuses, as they seek refuge from the scientists.
The main diclonius character is Lucy/Nyuu, a killer whose alter ego is a hapless and very cute child whose vocabulary and intelligence are quite limited.

The Kingdom of the Sun, Fuajarl was ruthlessly invaded by the Garden of Eden. They came seeking the King's Edel Raid, rumored to be one of the Seven Glittering Jewels (or Shichiko-hoju). Sensing their intent, the King hid his daughter with his Edel Raid and fought against the invasion but was defeated in battle that resulted in the desert kingdom being blanketed in a sheet of white snow. Escaping capture, the Crown Princess Achea Fuajarl XIV reacted with Jeen, the King's Edel Raid, and along with Puffe, the Kingdom's only mechanic, fled Fuajarl in an ancient tank. They are on a journey to restore the Kingdom and exact vengeance on the Garden of Eden. This story takes place two years after Erementar Gerad.

In a world filled with evil creatures called the "Rizoms" that threatens Kam's journey, a teenager who's said to be Laolyth's only son and a possible successor of this lost hero is... ?!

Follow the "path" of the two heroes from the Zero no Kiseki prestory comic!

A city is besieged by a group of monsters called Green.

From Mobots:

Renton is a 14-year-old boy who occasionally helps out his grandfather as a mechanic. But his feelings of dissatisfaction and frustration grow as his mundane and routine work cloud his visions for his future, and he dreams of flying around the world. It isn't until one day, a large human-like mech, a LFO (Light Finding Operation), falls from the sky in front of Renton, and appearing from the depths of the machine is a beautiful young girl named Eureka. And as she asks the dumbfounded Renton for repairs, the two will embark upon a fantastic journey into the unknown.

Ryousuke Akiba calls himself ES, a code name taken from a mysterious scientific experiment. He possesses strange mental powers: he can enter people's minds, discover their darkest secrets, even rearrange their memories. Ryousuke is an enigmatic and dangerous creation, but is he the only one?

In Esora, a city built around a colossal radio tower, a young man -- Nishina Kazu -- tires of the unchanging everyday world that he captures on his video camera. One day, as he is video taping some abandoned buildings, there is suddenly an explosion and a girl called Mamiru Ai appears before him. This marks the beginning of the change from the ordinary that he had been hoping for...

Set from 1581 to 1586 with flashbacks further into the past, this is the story of Tyrian Persimmon. Born to a Spanish mother with an English husband in this era of conflict between the two contries, Tyrian favors Spain. His father suspects that Tyrian is not his son because he doesn't look like the man at all, and regularly beats him. His mother's lover is discovered to be a Spanish spy and flees the country. Tyrian is determined to join the navy and eventually rejoin Geraldo.

At the age of 19 he begins to make his ruthless way up the ranks of the English navy.

From Hyper Parfait:

In Hades, the world where souls are dealt with, there are special individuals known as Enma, who have the ability to judge the lost souls. The Enma can decide whether souls go to heaven or hell, and are equipped with their own special weapon, known as a Judgement. When an evil soul causes a disturbance in Hades, Kouichiro’s powers as an Enma are revealed and he becomes the first person in twenty years invited to take the Enma exam. After having barely passed the exam, and been partnered with Chizuru, who is rumoured to be “the demon of the intelligence department”, just what will happen to Kouichiro next?

"An unknown city in an unknown land. Demons infest the land, madness rules the streets. Money and greed control the people who prey on each other. The young use their flesh, the strong their violence and sly their wits, trying to reign over the city. The weak are raped. Pleasure is only for the strong. That is the law, however cruel. The game has begun. The question is who will bring it to an end."

From Spoils:

Engage – a covenant pledged between knight and noble

This is the tale of individuals tied together by the sacred bonds of Engage

Tia is a young girl who hails from the remote regions of the Grunwald Empire. Due to royal decree, she is required to attend a prestigious academy located in the imperial capital. The academy serves not only as a networking spot for the children of aristocracy to meet and rub shoulders, but is also where the paths of nobles and knights cross.

Tia herself is on a mission to find a knight with great promise, however, who she stumbles upon instead is the academy’s problem child – Duran. Due to an encounter with Duran, Tia finds she is able to draw out a knight’s potential, normally only done via Engage. As someone who can call forth the powers of Engage without a pledged covenant, Tia finds herself the target of many knights…

Ken is a 15 year old boy with aspirations of becoming a musician; however his dad has different plans for him. After an argument he is kicked out of his house and forced to go on an adventure to be accepted back home, along with his faithful companion Note. What adventures and situations will Ken get himself into… Read Fantasy World to find out. Note: This is an english manga from the UK.

Continues the story of Dee, Ryo, and the rest of the gang in the 27th precinct of the New York police department. A new crime, new faces, new clues, and new loves can all be expected in this thrilling sequel!

This series has been on hold many times, and now the author has decided to stick to volumes instead of serializing. From Tokyopop: Welcome to Faeries' Landing, a place where the real world and the faerie realm collide. Sixteen-year-old Ryang doesn't realize that supernatural beings descend on his town at night, but when he stumbles on a group of faeries bathing, he ends up becoming guardian of Fanta, a grounded--and very fetching--faerie. Having an otherworldly babe hanging on you 24-7 doesn't sound so bad at first... but when Fanta’s rival curses Ryang, he is destined to encounter 108 doomed relationships...

At the end of the 21st century, humans have made great advancements in technology and were able to create a giant energy source to power that technology. However, this new source of energy overloaded and turned into a more devastating force than nuclear weapons. The catastrophe wiped out the majority of human civilization and those who survived lived in terror of the anarchy that took over. Hagakure Kakugo comes from a secret family that has protected people for generations from powerful organizations and evil from taking over. They are only awoken in time of need and it has been decades since Kakugo was conscious. His body had been heavily modified by fusing it with metals to enhance both his offense and defense. He uses an armor called the Exoskull that attaches to him to greatly boost his already superhuman power. Thus begins a story about a young man and his armor’s journey through hell.

"Exorcists" are the protectors of the human world with sole responsibility to deal with the evil demons that come from the magic world.... Lan Ximing, a normal student, unexpectedly meets a demon named Nilu and a fantastic journey unfolds before them. Here lies an unimaginable tale that is just waiting to be experienced!