The main character and “anti-hero”, The Rapeman, is a high school teacher by day and dispenses his surreal brand of “justice” at night under the business “Rapeman Services”, which is co-run with his uncle, a former surgeon. He uses rape as his weapon. The business’ motto is “Righting wrongs through penetration”.

The bastard son of a rich aristocrat is hellbent on seeking revenge ever since his father abandoned him and his mother.
He decides to teach his father a lesson by destroying what he treasures the most, his two daughters.
He infiltrates their prestigious school with a magical time-freezing device he received from a witch – and proceeds to repeatedly rape his half-sisters, leaving them confused, helpless and begging for mercy.
Source: Hentai Haven

Based on the manga by Miyabi Tsuzuru.
Kazuhiko has a big crush on his stepmother, or rather, he wants to have sex with her. Since he can’t just ask it from her directly nor force it on her, he comes up with quite a devious plan, step by step leading him closer to his goal. But in the end, his stepmother won’t be enough for him…

In the year of Space Age 216, beyond the limits of the Milky Way,
the sonar of exploratory vessel “Kikumasa” picks up an unconfirmed energy signal.
Excursion pod #18 is dispatched to the location.
Yukiko Akagi is the crew member aboard that ill-fated pod.
Three days before her wedding day, Yukino collides with an unidentified flying object.
When she gains consciousness again, she’s surrounded by male aliens.
Born entirely from cloned embryos they are similar to earth forms
and they’ve never seen or touched a woman. Yukino is their first contact.
She receives the full and untested force of their sexual release.

Hakohou High is a prestigious local school whose baseball team has made it to the National Championship in previous years. Saki is a first year student whose interest in baseball is sparked as she watches a game. Pursuing her dreams, Saki becomes a manager of the school’s baseball team. Her kind and thoughtful co-manager and senpai, Nozomi, and the other members of the baseball club give Saki a refreshing experience of school club life. Saki looks forward to making the best of her golden days of youth with her new teammates.
“A manager’s got to do whatever it takes to bring out the best in her team.” On the surface this sounds like good management philosophy, but here its meaning is dripping with sweat and lust! Saki’s sweaty teammates instill in her a deep sense of loyalty through copious amounts of pleasure. Eventually, through this strange baseball club tradition, Saki offers all of her body and heart to her teammates.

The story about a woman who was recently got married. As time went on, her husband gradually lost interest in his wife, and so wanted diversity in sex by other means…

Based on the game by Buruge on Demand (label of Blue Gale).
The story revolves around Masaru and his friend Ijuuin, and their sexually oriented exploits with 3 sisters, Kaede, Nanami, and Kurumi.. whom all work and manage a Cafe together. Kaede owns the cafe, which is also worked by her two sisters Nanami and Kurumi. Masaru has been offered a part-time job by Kaede, which sets him to work alongside the two other girls.
When Kaede ends up needing to be away from the Cafe for a month on an internship, she leaves Masaru in charge of the Cafe, putting an extension on his part-time job.. and granting him the extra responsibility of ‘looking after’ the other girls in Kaede’s absence.
Having his alone time with Nanami and Kurumi leads to some unexpected events.
Kurumi first confesses her love for Masaru, and he makes sure to take full advantage of the situation.. but then wouldn’t you know it? Nanami seems to be falling for the male protagonist as well. The sisters find out about Masaru’s two-timing efforts (like he cares), and they naturally become jealous of each other. When Kaede returns early from her internship, she accidentally happens across the others indulged within their expressions of affection for each other, which gives her and Ijuujin perfect opportunity to act on certain interests as well.
Too bad for him that Masaru will still end up getting all the love all to himself from all three of the sisters in the end.

An OVA based on a play of the same name by Ei Takatori depicting the activities of the Children’s Crusade from 13th century France.