The story involves human mutations called "diclonii", who are born with horns on their heads and possess telekinetic powers, in the form of invisible "arms" called vectors. The power of these arms vary, but they can stop normal bullets and deflect some others. The number of them differ with each diclinous, as does their full range.
The tendency for violence among diclonii is high, especially as they grow older. As children, their violence stems from a certain playfulness, unlike the absolute hatred of humans in their later years. Diclonii are rare, as they are the members of their species that are able to reproduce naturally.
Silpelits are more common. They are the offspring of two humans, the male of which has been infected with the mutation. Interestingly, only males can pass on the genes, and all diclonii and silpelits turn out to be female. Certain scientists noticed an increasing number of babies with horns being born, along with those children murdering their own parents and others, and tried to contain the spreading and find out the cause by placing 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.
The main non-mutant character in the story is Kouta, who ends up becoming increasingly involved with one diclonius in particular, the main mutant character Lucy, the only pure diclonius, as she seeks a way to infect or kill all of humanity. Lucy has a cruel and unsettling past, and she has long since lost her empathy for humans, except for Kouta.
However, Director Kakuzawa, who has diclonius ancestry although he doesn't have the vectors, has plans to mate with Lucy and start a true diclonius race. If Lucy is found and he manages to do so, humanity will be nonexistent.
Kouta and Lucy's lives have been intertwined since their childhood, but not necessarily in a good way. And after the virus is airborne and spread across all of Japan, what is the fate of humanity and who holds all of the answers?
(Source: luvsanime02)Included one-shots:
Volume 1: MOL
Volume 2: Digitopolis
Volume 3: memoria
Volume 5: Elfen Lied
Volume 8: Mou Hitotsu no Shiawase na Mirai and Sake wa Nomu Hou Nomareru Hou?

Nonomiya Yuuta, a ski Jumper aiming for Olympic gold, bursts onto the stage with his exceptional skills. However, his biggest problem is that he is not really a "HE"... The person claiming to be Nonomiya Yuuta is actually his twin sister, Nonomiya Nono... And with women's ski Jumping not being an official Olympic category, hiding her true identity is the only way for her to achieve the dreams of her father and brother and win Olympic gold.

When the two were still young, Saito and Kawana Subaru were close friends. But with Subaru coming from a wealthy family, she was sent to the top school while Saito had to settle for a regular education. But after painfully studying for years, he was finally accepted as a high school freshman through a scholarship program that only a handful of students are awarded. But what Saito thought was going to be a heartwarming reunion turned out horrible. Subaru had grown up beautiful and was the most popular person in school as she was kind to everyone, all except towards Saito who she seemed to despise.

Almost regretting his decision to come to the school, Saito wishes that somehow their dorm rooms would connect to each other. Magically, because it turns out that Subaru wished the same thing, their wish comes true but, in return, Subaru loses her self-control for one hour per day. During that time, her erotic desire for Saito, that she can normally hide, comes pouring out and her true intentions are revealed. He wants to take advantage of this once in a lifetime chance but doing so might jeopardize their relationship during the other 23 hours.

(Source: MangaHelpers)

When he was a child, Murakami was infatuated with a girl he called Kuroneko. She insisted on knowing about aliens and having met them, but no one believed her, even young Murakami was skeptical. One day, she decides to show him the aliens, but an accident occurs and Kuroneko dies while Murakami is left seriously wounded in the hospital.
Years go by and Murakami obsesses on finding proof of the existence of aliens because of a promise he had made with Kuroneko. Then, one day, a new transfer student comes to his class, who not only looks a lot like Kuroneko but is named Kuroha Neko.
And even though she insists on never having met Murakami before, the girl has superhuman strength and seems to even be able to predict the future!
How will Murakami's life change now that he has been saved by this mysterious girl that claims to be a magician?

Kumiko left Japan for LA in hopes of becoming a famous actress, but so far has only managed to get jobs as a stuntwoman. Now that her brother is getting married, she's coming back to Japan to visit, but once she arrives, something goes terribly wrong...

Youta "The Sun" Tada is an ordinary high schooler who dies and finds himself in a fantasy world where he is the only male. Can Youta survive in a world which has no resistance to him?

(Source MU)