Urotsukidoji: Legend of the Overfiend

Adventure Kid is an erotic manga series written and illustrated by Toshio Maeda. It was published by Wanimagazine into four volumes from 1988 to 1989 and it was adapted into an original video animation (OVA). Mixing horror, fantasy and comedy, it follows Norizaku and Midori as they find a demonic computer that sends them to Hell and destroys their world. They are transported to a World War II setting and they have to prevent their future to be ruined.

Japan in the year 19xx. There is no order or culture there, and it is a world ruled by humans with wild desires and degenerates (Diffs)!! C9, an orphan who doesn't know his mother, survives in a torture-like world. Toshio Maeda's masterpiece is available in digital format for the first time.

It is foretold that every 3,000 years the Choujin, or Overfiend will come. This prophesied being will unite the three worlds of the humans (ninjinkai), demons (makai), and the half-human animal spirits (juujinkai). This is support to usher in a period of great peace and prosperity. But, it can be that one demon's peace may not have the same meaning to a human.

Beings come to Earth with the intention of conquering the planet. They camouflage themselves, nesting and taking over human bodies. They plan to achieve their goal through reproduction, without avoiding violence and terrorizing the population. Such activities could not escape the attention of the Interplanetary Mutual Observation Agency…

The plane carrying Masao and his parents crashes in the Himalayan mountains and they are presumed dead. But then Masao suddenly shows up at his school - apparently alive. Masao doesn't know what happened and the authorities have no record of him entering the country. He finds himself plagued by horrific, bloody nightmares and soon supernatural events begin to occur at his school... This manga was adapted into the anime series "Nightmare Campus".

Habu Mioh, the son of the Dragon King, gets banished to the human realm as punishment for his lack of interest in living up to his role as successor to the throne. Once there, he finds himself under constant attack by various demon beasts, who mostly are interested in getting their hands on his liver, which is said to hold the secrets to eternal life and youthfulness.

A short fast-paced horror manga about a woman who is attacked by an ogre and rescued by an ogre hunter, who informs her that she's been cursed and the ogre has been summoned to kill her. Will the ogre hunter be successful at removing the curse, banishing the ogre, and saving the woman? Note: although this is primarily a horror manga, there is a moderate amount of nudity and small amount of explicit sex.

The story involves various ninja clans who continually fight each other. The female protagonist is Miko Mido, a young ninja-in-training and the next leader of the Miroku ninja clan. This clan has control over the Shikima, a perverted race of demons. However, when thieves steal the magic compact giving the clan this power, Miko has to fight the Shikima, utilizing her "sexcraft" ninjitsu in order to save the world. The Shikima live in a parallel dimension called the Shikima world, and one must perform specific sexual rituals in order to travel there. The Shikima are all sex-hungry monsters, led by the Shikima Lord, who also happens to be Miko Mido's father.

Jigoku no Senki is an erotically charged noir/action series written by Shiro Azuma and illustrated by Toshio Maeda that was originally serialized in 1977 under the title "Taxi Driver" but underwent a title change (feel free to speculate as to why) for its 3 volume tankoubon release in 1981. The story is about a former police detective who works as a taxi driver in order to keep his daughter on life support. He isn’t just a taxi driver, though, but also an extremely efficient hitman and he has a personal score to settle...