Kokone was studying in her room one day when her twin sister, Izuru, returned home. Izuru immediately went to their elder brother's room and the two began to make love to each other. Being twins, Kokone and Izuru are able to share feelings of pain and pleasure. Thus, unable to resist the waves of pleasure, Kokone began fingering herself until both rooms simultaneously echoed with the twins' cries of orgasm. 
Annoyed at them, Kokone decides to steal their brother from Izuru. 
(Source: AniDB, translated and adapted from official site by Cranston)

Episode 1: 
The story is about a brother Ani and his younger sister Kasumi who begin developing feelings towards one another. 
Episode 2: 
It's a love story of Sahara Satoshi and Aoba Chinatsudo walking to the same school. 
Episode 3: 
Is the story of Makoto and Kouichi. 
(Source: AniDB)

The main character is a white-collar worker. He has a wife, but she runs away from home. When he is at a loss what to do, Sayuri, his wife's mother, reaches out for him, "I'll replace her... Please..." As he lives with her, he gradually falls in love with her, and so does she... 
(Source: VNDB)

Based on H-game: Kyonyuu Majo produced by Waffle. 
Yuuto Akiyama, a butler with ancient powers, begins serving a household of busty vampires! Yuuto must satisfy these women, and figure out the secret of the strange house.

Based on the erotic game by Rose Crown. 
 
Nozomu is a student, but famous in the field of psychiatry. He works hard every day to find a way to remove mental concerns of women. Actually, his deceased father worked on this theme and he now takes it over. One day, he submits a report, but it is thrown out soon. The theme of his report is, "Women's current concerns attribute to their past mental conflicts, especially during adolescence. By removing their past mental concerns with hypnotism and making them experience a satisfying school life, their depression will be cured." "It's just an armchair theory. No one will believe it." Nozomu gets upset and makes up his mind to prove it. Days later, he somehow collects three girls, Mirai, his mother, Kyouka, Mirai's friend, and Izumi, his old friend. Like this, his grand experiment involving "married women in sailor's uniform" starts.... 
 
(Source: ErogeShop)

Based on the erotic game by Anim. 
 
My husband, Keiichiro, was struck down by illness. Mr. Noyama, our family doctor, said he would need to have a rest for a while. But he hasn't got well though a few weeks have passed. I have now a concern about myself. Yes, it's about sex.... It's impossible to ask for sex to my husband. I can't masturbate myself at home because there are my husband and daughter. I can't talk to anyone about it.... I recently feel sexually excited when Mr. Noyama comes to my house. Is this because I'm not sexually satisfied or I suffer from some kind of illness? Oh, Mr. Noyama comes again.... 
(Source: Eroge Shop)

Shinta is just an average student. But one day, a tentacle-shaped alien suddenly parasitizes in his penis. Shinta complains about it, but the alien answers there will be no problem because it can mimic. Shinta decides to satisfy his sexual desire using this power.... 
(Source: Eroge Shop)

Keith returns home to tell his father of his intention to be a painter, and discovers that the maid his father has hired is actually a prostitute his father shares with other men. What will he do when his father hires another maid for Keith and tries to induct his son into his carnal activities?

Based on the erotic game by Cattleya. 
 
Yohei happily lives with his mother, Kaho, and his cousin, Fumika. But one day, Kaho tells Yohei that Kaho is actually an older sister of his father, not his mother.... She also tells him that his mother passed away long time ago. Yohei is shocked to hear that, but he starts seeing Kaho as a woman, not as his mother. Days later, a woman, Ikue, moves to a house next to his. When Ikue first sees Yohei, she suddenly starts crying and Kaho turns pale. Ikue tells them she is a relative of Yohei's mother and she wants to accept him as an adopted child. Of course, Kaho and Fumika turn it down.... From that day, their lewd and erotic life starts.... 
 
(Source: ErogeShop)

The invisible stud returns to cause more mischief and spy on beautiful girls! Is Mie behind this again? His boss hears the invisible stud is back and confronts Mie, but he denies that he is behind it. Having put the invisible potion in a secure place and confirming that it was still there, they&rsquo;re left to wonder who the new invisible stud might be. 
(Source: HentaiTake)

A rumor spreads among young people that if a person gets on "that" train, he/she will disappear.... Most of them don't believe it, but it exists.... It's called Michishio. Michishio was invented to train young girls and make them sex slaves. At first sight, the train is completely the same as a normal train. However, it shows its true self once in a few months. The girls who get on the train are severely trained and become sex slaves.... Seiji is a train conductor. He can do whatever he wants to the girls on the train since he has a special training ability. And another Michishio now departs.... 
(Source: HimeyaShop)

Based on the erotic game by Anim. 
 
Tomonori is a university student. His mother passed away two years ago, but his father, Seiichi, soon got remarried to Hanae. He now happily lives with Seiichi, Hanae, and Marie, Hanae's daughter. But one day, he gets to know the fact that Seiichi had been committing adultery with Hanae. "He betrayed my mother.... Ok, I'll destroy everything around him! I'll steal his wife first." His devotion to Hanae has got crooked and his revenge starts though he knows it'll put his family into misery and he'll never be able to turn back.... 
 
(Source: ErogeShop)

I'm Makoto. My father is always busy with his business. I don't remember my mother because she died when I was a kid. I now live with my older sister. One day, new mother and younger sister join us all of a sudden! Of course, I'm happy. I masturbate hard every day like never before, but a mishap happens to me. I get involved in a traffic accident and am sent to hospital.... There, however, works my old friend as a nurse. Also, my friend is hospitalized there. Oh, I'll become friends with them using the game given from a strange salesperson.... 
(Source: ErogeShop)

Based on the erotic game by Anim. 
 
Yoko is happy. She lives a peaceful life with her husband, Masahiko, and their son, Kazushi. But there is one thing she complains... They haven't had sex for a long time. One day, a friend of Kazushi comes to her house. His name is Ryouto. He is handsome and polite. But she doesn't know yet that Ryouto has a secret personality... 
 
(Source: AniDB)

Hirau-kun comes into the possession of a sex android after a mishap and has her do a lot of perverted things, such as transforming into famous movie stars and his co-workers.

A horny headmaster and his naughty nephews are out to train twelve teachers to be sex slaves. They'll use any scheme in their arsenal to get the hot lady professors to share their carnal knowledge. But even if the women give their bodies over freely, that doesn't mean they'll just take it lying down. The extracurricular activities are nonstop in every nook and cranny of this institute of lustful learning. 
(Source: AniDB)

Naoto is a university student. One day, he meets Ayane, his old friend, by chance after an interval of several years. Also, Chika, his old friend as well, suddenly appears in front of him. She tells him to become her tutor and they start living together but will Naoto resist the temptation of those delicious big boobs?

Based on the erotic game by rúf. 
 
Makoto Sugiura has studied his whole life to become a doctor. He's looking for revenge on the doctor with a scalpel scar across his left hand. It was that doctor who is responsible for his sister's death. After finally being assigned to the right hospital, Makoto finds that the entire staff is involved in something suspicious. He decides to sleep his way to the truth, squeezing a confession out of one nurse after another until he makes his way to the top. 
 
(Source: AniDB)

Based on the erotic game by Anim. 
 
One day, when Koichi was on a crowded train, a girl in front of him suddenly cried out, "He's a train molester!" "What!? No, I didn't do that!" He was mistakenly arrested for train molestation. Two years later, Koichi is now on a train to take revenge on that girl, "I'll do it...." 
 
(Source: ErogeShop)

(OVA 1: A Boy's Toy) 
Shinta Murakoshi just scored the best toy a guy could ever ask for: a hypnotic gun. Armed with the power to make anyone do anything at any time, he sets off to fulfill his fantasies and turn every woman he meets into his secret personal love slave! 
(OVA 2: Love Trance) 
Shinta continues to add to his hypnotic harem, but when his latest target, the sexy Midori, comes on to him, he's not sure what to do. Does she actually have the hots for him or is it some sort of trick?

One day, a boy, Kashima Yuji is given a game by a mysterious man. He brings it home and attempts to play it with his family. Things go wrong when the game orders him to do something otherwise you won't do with your mom, and things get complicated, but even worse when your sister gets involved in that game.

Based on the erotic game by Guilty. 
Ryo and his stepmother Madoka lived happily together, lusting after each other but content to just watch each other from a distance without doing anything about it. Until one day Ryo discovered that his stepmom was indebted to the Yotsuya family. In order to help her he offered to sell himself and work for Akie Yotsuya, the head of the family. But he had no idea what awaited him in the mansion... At first it was just Ryo, Akie, and Fumi, the maid. But soon two more people moved in: Reiko, Akie&rsquo;s sister... and Madoka, Ryo's mother. And as time passed Ryo discovered that the four women he was sharing the mansion with are connected in more ways than one...
 
(Source: Anime News Network)

Adolpho has his heart set on a life of service to God, that is untill he met the engaged village girl Michaella. After that innocent encounter, Adolpho starts getting midnight visits from a hedonistic devil that appeears startlingly like Michaella. Confused, Adolpho decides to confront Michaella with his new feelings, which can lead to dire consequences for both.
 
(Source: Anime News Network)

Longtime friends Erika and Akino have a difficult road ahead of them. One minute, they're basking in the warm summer air, and the next, they're sucked into a strange dimension. There, an army of mysterious soldiers declare that the two women are allies of an enemy nation and put them through all manner of perverse torture. But even if they could escape their captors, where could they run when they don't even know where they are? 
(Source: Mania.com)

Y.O.U.C