Based on the game by Nine Heads. 
A brother and his sister were madly in love with each other, but their love would not last forever. His sister suffering from an illness that could not be cured, the brother did everything he could to help her. Things were going well until one day when he met a girl. With her introduction, things quickly changed for him and suddenly his sister's illness took a turn for the worse and eventually led her to death. 
However, his love for her was far too great for him to forget his memories of her. Feeling that god betrayed him, he went against his teachings and turned to a greater power: the demon! The demon agrees to help him out in exchange for the blood of a virgin girl&mdash;his new friend. 
(Source: AniDB)

Isheildo is a young prince from the small country of Bosarre. Two larger nations that border Bosarre have sent their princesses to stay with Isheildo for one and a half months, hoping to gain more political power by having him marry one of them. Both are desperate for some kind of alliance and have to allow Isheildo one and a half months to decide whether he will marry Bellshil (of the east country of Rohan) or Ariel (of the West country of Gerod). Both princesses are desperate to win him over, and of course, will go to any lengths to ensure that the diplomatic relationship can be formed.
 
(Source: Anime News Network)

Mai was happily to get married until one day she lost her fiancee,Yuji in an accident.Mai thought all hope was lost, however she remembered about his research.With the research they are a ble to create a human being from a sample of a DNA.Mai decides to have Yuji's child this way.

Based on the erotic game by BLACKPACKAGE (BLACK PACKAGE TRY)
 
Sister Rosaria is working at the village`s local church. Everything has been peaceful and many days of happiness have passed. One day a new priest and a sister arrive...and her happiness is suddenly shattered. The two are imposters, villains on the run for theft and murder. But that isn`t the only problem...the man is a former priest who sexually assaulted sister Rosaria many times in the past. Now, the village`s peace is in her hands; if she doesn`t obey "Father Edwards", he has sworn to kill every single one of the villagers...

An underground society lies beneath the surface of Tokyo. This society has kept silent for many years, but now, they are on the move. They are kidnapping four mikos and use their powers to wake up a long forgotten god...
 
(Source: Anime News Network)

Story 1: 
Having heard about a housewife passing down her late husband&rsquo;s wealth to her daughter, two hoodlums invaded their home. After finding that the women did not have the money with them at the present time, the two men held the women hostage and used them to take care of their own personal sexual needs and desires. 
Story 2: 
A young woman accepts a job doing modeling poses for an art class. All was going well until the students demanded more out of the situation so exciting sexual encounters ensued.

This explicit anime takes place at an unusual school in which sex between students and, above all, with teachers, seems to be the norm rather than the exception. This first volume of the aptly named HOT JUICY TEACHER series focuses on Yuichiro, a formerly good-natured student who has turned twisted since being falsely accused of rape at a previous school. At his new school, he encounters a group of perverted, abusive bullies, some of their victims, and any number of extremely attractive and libidinous young instructors. Excellent character design and quality animation set this apart from the genre's many similar titles. 
(Source: AniDB)

Stuffing an old bag full of contents from a safe, Cruz hops on his motorcycle and faces an uncertain future. 
(Source: AniDB)

This is a historic Japanese style hotel, but after Yuji began to work part-time, everything has gone wrong. First, the young landlady and a waitress fell victims to him. Not being satisfied with them, the next games he aims at are three young married women staying at the hotel. 
(Source: AnimeNfo)

Sayako is a new nurse at this certain school. She is what you call a diva: nice pretty face, slender body with the perfect curves and last but not least, very well-formed bust. But there is more to her than meets the eye. 
(Source: AniDB)

To the public eye, it looks like any other ordinary school; however, one club is secretly recruiting girls to make them their personal sex slaves and brainwashing the newly recruited males into enjoying one another. Which club is responsible for these demented activities, and how is it affecting the other clubs? One thing is for sure: the only thing that's left is a dark and hopeless future.

In a certain town, there were consecutive phantom assaults. Because the incidents were extraordinarily, there was a rumor that a ghost or supernatural creature caused them. The students in the school which Akitoshi went to were frightened. One day, an unknown girl appeared in the school. However, all the students except Akitoshi thought they had known her. Feeling strange, he shadowed her in order to investigate her but he lost sight of her. At that moment, he heard the scream of a woman from the nearby material yard and went to the place where the scream came from. There he found the beautiful girl of the school, Mikage. Mikage was surrounded by monsters "Yuragi" (fluctuation), and she was hanged naked. Yuragi noticed Akitoshi and began to attack him. Then, the fighter, Ai, appeared and cut them down. 
Akitoshi stared at Ai. What was her true character, an enemy or an ally? 
(Source: AnimeNfo)

The main character, Yu, was at the depths of despair; he was dumped by his lover, and failed in the entrance exams. He moved to a new apartment to engage in studying for the entrance exam next year. However, he found that his new room was above an erotic night club. When he entered the room, there was a girl changing her clothes. 
(Source: AnimeNfo)

Three wives are required to attend a parent/teacher conference because their children were in trouble at school. When they get to the school, they are welcomed by two men, who tell them that the school is closed. The men then lead them to an old abandoned school and decide to punish them in place of their children.
 
(Source: Anime News Network)

Keisuke Shimizu, upset over the problems in his household, becomes a delinquent and sees women as only sexual tools. His class representative, Orie Yuki, wants to change his beliefs. To show him the power of true love, Orie agrees to be his sex slave for three months. Orie has no idea what her decision will have on her future, especially since Keisuke's attention is away from his former lover.
 
(Source: Anime News Network)

Shibui Ryuji is a teacher of a girl school whose students are born in well-off families. All students hate him because of his figure and perverted nature. However, he happens to know the weakness of Tenkawa Ayumi, so he raped her. Tasting blood, he begins to rape his students, one after another taking advantages of their weakness. 
(Source: AnimeNfo)

Sakuraba Kotaro succeeded to a little grocery store from his dead father. With help of Nagisha, his mother-in-law, and Nagisa, his sister, he managed to keep the store. One day, a big supermarket, Kaneyu, urged him to deliver the shop. The man in charge of Kaneyu was his brother who had run away from home giving up his father's business. 
(Source: AnimeNfo)

Long time ago, the Rindo family was cursed by a monster. Since then, new born babies have been girls. To break the curse, they had to marry persons of the Higetsu family who have strong spiritual power, and have to bear a child by the next red moon. Now, the curse befalls to Rindo Naoto. In order to break the curse, he has to beget a child with one of four sisters of the Higetsus. 
(Source: AnimeNfo)

Mitsuko is a beautiful woman who had just married. She went to her husband's house and began to live with his family, but it was the beginning of her life as a sex slave for most of the males in her husband's family. 
 
Note: The R1 version of episode 4 had a short scene at the very end removed due to loli content.

Distol, a prince of Asteria, had passed humiliating days as a hostage in the neighboring country Bartrage, for 8 years. His mother had been also sent to the country, but she ended up dying. Since then, he made efforts to learn fencing and acquiring the knowledge and cultures in order to protect important himself. However, one day, he knew that his sister-in-law whom he had left in his country was elected as a "Holy Lady" in order to seal Satan. Holy Lady would devote her life to seal Satan. Because he couldn't save his loving sister, he felt his weakness. 
Then a beautiful girl in black clothes appeared in front of him, and she said she was a witch. In exchange for a strong magic to save his sister, she imposed two conditions on him. They were that he would invade Bartrage to get the secret treasure of the royal family, and that he would kidnap Princess Irina. 
(Source: AniDB)

* Based on a game by Crossnet-Pie 
Daisuke Ichijo is a new teacher at Kisaragi Academy, an all female school, and he is assigned to be a job counselor. To find the appropriate job for students, he role-plays with the girl students who wear various uniforms such as a nurse, a shrine maiden, and so on.

Based on the erotic game by G.J?. 
 
Keisuke lives in with 10 sisters, they all have great bodies and boobs, but he can't touch them because they're relatives... or can he, follow him on his quest to have sex with all of his sisters.

Wataru is a young man who moves into an apartment next to Tomoka and Fumie Fusono, two voluptuous sisters who used to know him when he was a shy child. Now Wataru is all grown up, and the Fusono sisters are ready to take full advantage of that fact.
 
(Source: Anime News Network)

Miyagawa Yuki is a secret agent of governmental organization. She and her colleagues, Reiko Carrere Yukiko and Morishita Kana were ordered to spy on a pharmaceutical company that is under susption for producing illegal drugs. However, their activities are known to the company, and they are caught by research workers. Then they are molested on the pretext of experiments. 

Kazuhiko's father has just recently married a beautiful young woman named Misako and he dreams of his new mother all the time. While Yosuke, his father has remained cool to her and her needs, Misako has been getting lewd calls and gifts of sex toys from that same person. Soon, unable to hold herself back, Misako finds herself trapped within Kazuhiko's power and willingly places all of her physical needs in his care. But Kazuhiko is not satisfied with just his step-mother. He has also set his eyes on Emiko, Misako's little sister. In an unforgivable secret triangular relationship, it is a secret that must be hidden from Yosuke or the cost will tear the family apart.
 
(Source: Anime News Network)

JapanAnime