Washizuka Shinichiro has just woken up after returning to Japan with his father the hard way, with a collar on his neck and his father gone, leaving a note that he’ll be back in 2-3 years and saying that he’s been left on the grounds of a prestigious school and he’s been enrolled. But before he can get there he has to find the school and use all of his survival skills to get through a high-tech environment gone awry, along with a female student he found sunbathing…

This comic is about a cosplay cafe and the cute and loveable characters working there

Oniko, as she is called, is a demon who has a severe interest in humans and one day decides she wants to become a human herself!

Yatsufusa Yoh's father reappears after a year and suddenly enrolls him into a school out of the blue. Offered the chance to meet with an old friend, he sets out only to run across two Nemesis Power Users and the battle against Karma begins...

Magamo Yoshihiro accidentally walks in Anna's room as she was in her leather outfit masturbating in broad daylight. This chance encounter will define an ever changing relationship between them especially as they go to the same school!

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Urara would really like to be a normal high school girl, but her mad scientist older sister and mother make this a difficult goal. For their latest experiment, they've fused Urara's neighbor and childhood friend Takaharu into Urara's body. After discovering this, Urara destroyed some of the experimental apparatus in a fit of rage, leaving them stuck with each other for the time being. Takaharu is a high school graduate who sells erotic manga while waiting to retake his college entrance exams. Takaharu takes over Urara's body when she falls asleep or passes out, and, to Urara's embarrassment, has been using it as source material for his manga. Will the two of them be able to deal with sharing a body until Urara's family can put things right?

The Damned Devil's Army are rampaging around the world and the only person who can stop them is the Earth Warrior.

From Meijinification

Matsuka Ryou is a school girl who doesn't seem to take life seriously. She dreams of growing up and becoming a wanderer or a minstrel. She's the adviser and sole member of the light music club (although it's not really a club). However when she picks up a key that a teacher drops, a whole new world is opened up to her...

It is the 18th century in Naples, Italy. There is a girl named Maria living peacefully in the city, but she is more than she appears. She is like a goddess of death, with a sword that cuts through everything. But what exactly is she? Where has she come from and what cruel destiny awaits her?

The story is set in a futuristic and peaceful world made possible thanks to the invention of the Manifestation Engine (示現エンジン Jigen Enjin), a powerful engine that creates energy from the sky and helped to prevent an energy crisis five years prior.
On the island of Izu Ōshima, Akane Isshiki lives a peaceful life with her family. When the world is threatened by an alien force known as the Alone, Akane is given a special key by her grandfather, Kenjirou, which allows her to access the Vivid System and wear a Pallet Suit, granting her special powers. Joined by her friends Aoi, Wakaba and Himawari, Akane fights to protect the world from the Alone.

In a universe where men and women are mortal enemies, Hibiki is captured by a band of female pirates. The group find themselves stranded with a super ship they dub the Nirvana and set out for the female home planet. Along the way, they discover the existence of the "The Harvest" and the possible destruction of both men and women.

The manga differs greatly from the anime, with fewer characters and focusing more on the relationship between Dita and Hibiki.

From MangaHelpers:

There are people in the world who have strengthened their heart and spirit beyond imagination; so much so that they are able to materialize objects just by willing it and its potency is only limited by the users' determination. These people from the far east call themselves the Wazabito and are admired for their power that transcends the physical universe.

Tekuni is a cute Wazabito swordswoman who is traveling the world to train and master her abilities. With her friend Huk-Ro, the owl of knowledge, Tekuni wanders from one danger to another, making friends in the process. [vyc]

— By the author of History's Strongest Disciple Kenichi

From Batoto: Han Narum, a boy who believes small things are the best. A little girl found him. "I found you. My boyfriend." And at the same time he asked "what's that mean?" someone else appeared. What? The robots known as loveroids transform into adults if they receive a loving confession? And the winner of the "loveroid game" in which the loveroids fight will gain 10 billion won?! A light and lively battle comedy, start! Original Webtoon http://www.comicgt.com/WebToon/ComicDetail?comicsIdx=72

Tsuyomaru is a girlish boy while Hazumi is a tomboyish girl. Tsuyomaru is challenged to a fight by a student of another karate school, and while using a training machine operated by Hazumi, something goes wrong and they switch bodies...

Some kind of global catastrophe results in magic working. So now there are wizards, rangers (shape changers), and elf looking people. A remotely posted squad must fight mercenaries equipped with sci-fi technology and magic to find their missing commander.

Working at Kaikarou in the red-light district of Edo Yoshiwara, Ikutarou finds himself among many beautiful women. One in particular, Fuyou, seems to have been gifted with not only beauty but intelligence as well. An intelligence that people from many walks of life secretly turn to when they cannot go to the police. After discovering this secret, Ikutarou is made to be Fuyou's "feet," made to go out to observe crime scenes and evidence to report back to Fuyou so that she may solve the case even while being forbidden from leaving Kaikarou. Will this impromptu partnership work out? Will Fuyou be able to solve the case?

You-Geon, a high school student, is saved from drowning by a mysterious girl his own age. Indeed, this girl is a North Korean agent trained to kill. The encounter which will completely change You-Geon's peaceful life means that this mysterious girl never leaves You-Geon alone for a second worried he might reveal her secret to someone. The atmosphere at the high school will never be the same again...

A gag comedy depicting the everyday life of Komori-chan, a little girl whose laziness knows no bounds.

Official: A pubescent boy's dangerous happenings.Unofficial: Guy gets into a lot of embarrassing, sexually-charged situations in this episodic gag manga.