Pink Pineapple

The all female crew of the transport ship Muse is on a mission in deep space. They pick up an SOS signal and discover a derelict space cruiser where all the women have died mysteriously. They take the only survivor, a young woman named Flair, and detonate the ghost ship. However, the danger is just beginning. With Flair on the Muse, the romances between the women begin to take a new turn. One by one, the crewmembers are attacked by a mysterious alien presence, desperate to find a way to reproduce with human women!

Manami, the sole survivor of Angel of Darkness 2, is rushed to hospital where she slips into a deep sleep. A priest correctly suspects that the demon (now referred to as an Injuu) is inside Manami's body, but by the time he is able to confirm his theory, the creature has already moved on. As before, the tentacled beastie passes from host to host (by thrusting its slimy appendages into its victims' orifices), eventually ending up inside goody-goody schoolgirl Fumie, who does her best 'Linda Blair' impersonation for a while, before the priest inevitably turns up to save the day.

This slice of shot-on-video hentai horror kicks off with a crazy old woman stealing what looks like all-butter shortbread from three statues wearing red hats. This causes an earthquake which releases ancient demon spores from a cave into a nearby pool of water. Unfortunately, this pool is precisely where a lesbian professor—part of a group of students and teachers who are spending a few days camping in the woods—decides to refill her water canteen. She accidentally ingests the spores, which causes the eruption of huge, thrashing, veiny, slime-covered tentacles that seek out new victims and enter the nearest orifice, thus allowing the demon to pass from host to host.

In this first installment of the series - we are introduced to Keisuke: mild mannered school-teacher by day - avenging angel of rape by night - and his goofy Uncle, who together run Rapeman Services. Their "services" are called-upon by a nightclub owner who tells a sob story about having her boyfriend, a current political candidate, stolen by his secretary, and asks Rapeman to "take care of her" as an act of revenge. This is done per the nightclub owner's request - but we soon find that the story was just a cover to cause a bigger scandal that involves rival a seedy rival politician and the Yakuza...

At a high school in Tokyo, several of the female students have been moon-lighting as prostitutes. A teacher catches onto this fact and goes about putting an end to it. Things go awry when he discovers he turns into a sex demon with tentacles whenever he gets aroused (huh?). He turns from savior to vilifier, poor prostitute school girls.

Keisuke is a timid and nerdy high-school teacher by day, and a leather clad rapist "superhero" by night. One day, one of Keisuke's students is found dead, and her death is ruled an accident. Keisuke and the girl's mother don't believe her death to be accidental – and upon investigation, Keisuke and Uncle Shotoku unknowingly delve into an underground world of shady cops, scummy drug dealers, corrupt teachers, and a rape-porn ring. Of course, with Rapeman's upstanding moral values, he must do something to avenge the young student's death, bring down the criminals and right wrongs through penetration!

This time around, the demon is trapped inside sexy but wholesome schoolgirl Izumi, but is unable to get up to its usual tricks (rampant orifice invasion) thanks to the crucifix that she wears around her neck. Out to locate and destroy the monster are a nun and a priest, but their efforts are hampered by Izumi's evil protector Sakiko, who does her best to help the girl realise her true tentacle-thrashing potential (and, in a Carrie-style side story, also settle the score with a group of nasty school bullies who have been making Izumi's life hell).

Based on the master of SM, Dan Oniroku. Another story about females getting tied up.