Based on the doujin manga by Joy Ride/Yorokobi No Kuni.

Certain subjects being taught these days at college aren’t always on the curriculum… Sex education is one of them! Here at our all-girls school, one male teacher takes it upon himself to best educate students in the ways of carnal knowledge. Using (and abusing) his authority, he lures the hottest students into his lair and has his sleazy way with them! In the the end, these girls will learn some lessons they’ll never forget.

Kyle, the protagonist of this story, is one of the 7 heroes who defeated the evil overlord. After that battle he starts a conquest of the continent in order to unite the humans who live on it. Standing against Kyle is only his younger brother Syll, who is also one of the seven heroes. Kyle stole his throne, but failed to kill him. One day, another of the 7 heroes appears before Kyle. She is Nina, an elven princess. Kyle knows that Nina and Syll are lovers, and a dark desire begins to burn inside of him…

There is a world where humans and elves live together. Elves rule the world because of their intelligence and longevity. But one day, humans rise in rebellion and a big war breaks out. After a long battle, both countries decide to stop the war by a marriage of convenience. Arsura, a princess of elf country, is chosen as a bride. However, when she is on her way to the human territory, she and Willan, her sister and security guard, are kidnapped by someone! While elves and humans push responsibility to each other, a group of monsters appear! It’s them who kidnapped elf sisters. Their boss is Darsh, who is half human and half elf. What is his purpose…? Another war breaks out now!

Elfina lived a life of luxury as a member of the royal family. She was waited on hand and foot and had a team of servants. That was until her country was invaded! Now Elfina must comply to the sexual demands of her new masters and it doesn’t matter how humiliating or intimate the favors!

Emi is a high-school girl with a very strong love for her younger step-brother. She finally decides that it is time to confess her love to him, since it is near her 18th birthday. But before the climactic moment where she can confess her love; debt collectors arrive to confiscate her father’s properties.

It has been a year since Misako became Yosuke Amamiya’s wife, but her new stepson Kazuhiko is still barely acknowledging her, let alone seeing her as a mother figure. However, there is a more pressing matter on her mind: when she is alone at home, she frequently receives menacing calls from a stranger possessing detailed knowledge of her day-to-day life. Unable to bring this issue up with Yosuke, she remains silent about these disturbing interactions.

Just as Kazuhiko starts warming up to Misako, things take a darker turn when she gets a sex toy delivered to her door. Left unsatisfied by her workaholic husband, she begins to engage in a new pastime: masturbating while on the phone with the unknown speaker. One day, Misako realizes that she is not the only one with a dirty secret when she witnesses Kazuhiko pleasuring himself with her underwear! Now aware that her stepson thinks of her as a woman, where will all this sexual tension lead?

Based on the game by Frill.

Based on the game by Atelier Kaguya Bare

Flower, a local game design studio, finds itself on the verge of shutting down. After its first release turned out to be a complete letdown, the studio is now struggling to make ends meet. The employees of this all-female company desperately need additional hands to help them finish a new project on time. Tomoya Mochizuki’s passion is erotic games, or “erogames.” He can neither write scenarios nor program, and his artistic skills are quite frankly terrible. However, owing to his massive experience in the field, Nene Sonono—Flower’s director—decides to hire him as a consultant. The first thing Tomoya points out is that Flower’s employees have no sexual experience; thus, their scenarios and sex scenes lack in-depth and firsthand expertise. Eager to learn and develop their professional skills, the girls embark on a crash course to grasp the essence of erogames. Under the attentive eye of Tomoya, they explore previously uncharted waters of sexual pleasure—all for the sake of the company’s survival.

They wake up in a white room remembering nothing The protagonist Takato Keisuke and 6 others are locked up in these hidden white rooms. His childhood friend Hokari Kanae, classmate Ando Miyako, underclassmate Mikaba Rika, English teacher Aoi Natsuki, same year Byakuya Rinne, and classmate Manaka Nemu. While still confused about their unusual situation, a “mystery voice” suddenly speaks to them: “A game has now started. In order to escape the room, Keisuke is the “unlocker” and one heroine the “keyhole”. With an assigned act, he must “use the key”.