After the death of his grandfather, Yoshisuzu Shougo moves into the mansion left to him. He lives there with Otosumi Youko, the maid. Shougo often has sex with Youko, but, while in the half asleep state following orgasm, he always sees a vision of a beautiful girl. The girl's name is Reiko, whose picture adorns a wall within the mansion.

Narifumi Hosokawa prepares for his high school's culture festival with the Kadomori twins, Shizuku and Kasumi. While everyone is distracted, Shizuku decides to open a mysterious gate through the use of magic and travel to an alternate world.

A Long time ago, a curse was cast upon the Rindo family. The curse: the family could only give birth to girls. The only way to temporarily lift the curse was to have a child with someone from the Hizuki family. Once the curse was lifted, it would haunt the family again every 3rd generation. Many years have passed and now, Naoto Rindo will be the unfortunate one. His former fiancé from the Hizuki family has passed away due to a tragic accident and now he must impregnate one of the other four girls from the Hizuki family, however, time is running short. Will he be able to successfully impregnate one of the girls with a boy? Or will the curse ruin his life, forever... ~from anidb

Oh no! Saiyuki it isn't so! The classic novel from Chinese literature takes an unexpected turn down a kinky road to Japan and the majority of the cast somehow end up with sex changes! Now with only one male member left between them, our heroes are going to have to find some new ways to amuse themselves; which probably won't be too hard since they're in a town where anything and everything can be had for a price and even a dragon has to watch hisα (well, you get the idea!) So will these lethal lovelies be willing to Go-ku the distance? Oh, **** yeah! Get ready for a gender bender fender rear ender that'll plunge deeper into the west than you ever dreamed imaginable, over and over again, in THE KARMA SAIYUKI!!

Fumi Manjoume enters Kamakura's accelerated high school - Matsuoka All-Girls High School. While waiting at the Kamakura station on the day of her entrance ceremony, she runs into an old childhood friend whom she had not seen in 10 years: Akira Okudaira. As their friendship is rekindled and they start falling back into the rhythm of friends again, it starts a delicate love story...

Louise Françoise Le Blanc de La Vallière’s name is so long and her spell-casting skills are so poor that everyone at the Tristain Academy of Magic just calls her “Louise the Zero.” Louise’s humiliation only increases during an important second-year test, she inexplicably summons Saito Hiraga, a totally normal teenager from Tokyo. Now she’s stuck with him and Saito’s stuck with the lousy life of being a familiar.

Four years ago, Kazuma Kannagi was defeated by his cousin Ayano Kannagi for the right to be the successor of Enraiha, a sword passed down in the Kannagi family. His defeat, along with his lack of talent for En-Jutsu, the fire arts, the Kannagis' specialty, resulted in his banishment from the family. Now, Kazuma returns as Kazuma Yagami, a skilled master of Fū-Jutsu, the wind arts.

Two sisters, Kaho and Kasumi, are eyes deep in debt thanks to their now deceased father. Ookura Hiroyuki, a student of Kasumi who has a huge crush on her, finds out about her financial difficulties and offers to help out... but, only if... ~ from anidb

A long time ago, the Rindo Clan was cursed by a vengeful spirit so that no male children would ever be born. To counter the curse, every three generations, the Rindo must beget children with a family possessing strong spiritual energy. Ever since that day, the Higetsu family have been important and well-treated servants of the Rindo. It is their duty to mix their bloodlines every three generations with that of the Rindo heir. Time passed and the practice continues to this day. The current heir is Naoto whose fiancee, Suzune, passed away in an accident. Now, he is required to find a replacement.

* Based on the erotic game by Softhouse-seal Grandee. In the near future, mankind is on the brink of extinction owing to a drastic decline in the birth rate of males. To counter the declining overall birth rate, the country has introduced a new law and the Free Sex Licence. This Licence can be presented to any woman, anytime, anywhere, and that woman is legally bound to have sex with its bearer. One night, Takumi receives one such Free Sex Licence and his life changes drastically. He has sex with Sara, a genius who's also curious about sex, and with Misaki, elder sister of his childhood friend Rin. Rin, who's secretly in love with Takumi, is extremely agitated by these occurrences. However, when Takumi inadvertently displays the licence in the classroom, Rin's first time is done in public...

* Based on the erotic game by Speed. Oogami Island is normally a peaceful isle with lush green scenery, but is now a place of depraved wanton lust. The contagion Unknown - Level 4 has become epidemic. 3 girls, Hyuuga Natsu, Ochi Akari, and Hanazawa Airi find themselves trapped in a sports facility where they are assaulted by the infected.

The story revolves around Takuro Hayami who transferred to the mostly female Saint Arcadia School. Seemingly all of the girls want to have sex with him because the school only recently started admitting male students. Takuro seems like a normal student, but what the girls later realize when they try to take advantage of him is that he has a secret. Takuro has an “Ultimate Sex Power” that becomes the focus of St. Arcadia’s sexual power struggle.

Shinji's parents have died in an accident years ago, so he has grown up in an orphanage. Now, years later, he gets approached by a maid with the name Zero who claims that Shinji's father was the only son of a millionaire. His grandfather now intends Shinji to inherit his business. Shinji doesn't feel much for inheriting a company from a person he doesn't know, especially since he has plans for his own life and wants to eventually marry his childhood friend Sae. There is only a slight drawback: his grandfather won’t take no for an answer. He did leave an opt-out option though; if Shinji can find a girl with a certain birthmark, he will be given his freedom and won’t have to inherit and lead the company. The only catch is… the birthmark will only appear after the girl climaxes. How will Shinji manage to get out of this deal while still staying true to his childhood love?

Daisuke is a new teacher in school. He became popular with everyone in a matter of days. He conducts a class that allows his students to role-play as whatever they wish to be when they graduate, but some say this is a plot to spend extra time with the girls, and the girls expect more then just lessons.

Joe Yuki, one of the coolest DJs in Shibuya, has a secret identity as the leader of gangs. Because of his traumatic childhood, he fiercely hates "weaklings" and sees winning as his only option in life. One night, an old man is being taunted by the kid known as "the human punching bag." The old man reminds Joe of his parents and childhood, and he uncontrollably challenges the kid to a fight. A fight in which he's defeated, and his pride is utterly shattered into pieces.

Based on the erotic game by Speed.

This is a continuation of Kansen's story: Inyoku no Rensa The story where Hiroshi, Yuuki, Hayami and his school friends are doing a Study Tour. Suddenly while on the way there was a big explosion that destroyed all the cities. At that time the spread of the virus occurred very quickly through sex. How do they survive in this sex virus incident?

Four years have passed since the initial outbreak of the Unknown virus epidemic, and the terrifying plague which depopulated the Tohoku region of Japan has been reduced to a mere memory, thanks to drastic quarantine measures coupled with an effective vaccine. But the Unknown virus is not dead yet and soon, very soon, an inescapable doom will fall upon Wataru Ayase and his family and friends, trapping them inside the "Hell on Earth" madhouse which originally was their home city, Tokyo...

Three students are in a school late at night fighting supernatural enemies. As they are about to leave, they get attacked and trapped. Based on the erotic game by Tinker Bell.

Love, Elections & Chocolate, is a Japanese adult visual novel developed by Sprite, and it was released in Japan on October 29, 2010 for Windows PCs. The gameplay in Love, Elections & Chocolate follows a branching plot line, which offers pre-determined scenarios with courses of interaction, and focuses on the appeal of the five female main characters by the player character. There have been two manga adaptations based on the game: one each serialized in ASCII Media Works' Dengeki G's Magazine and Dengeki Daioh. A 12-episode anime TV series adaptation produced by AIC Build and directed by Tōru Kitahata aired between July and September 2012. An additional episode was released on the series' final Blu-ray Disc and DVD volume in March 2013.

Story revolves around the release of a mysterious virus that causes an intense and irresistible sexual desire in infected people.