There's a men's room in every fertility clinic that is used to extract sperm from men.

In other words, it's a masturbation room.

Before entering the room, customers are handed a special cup, and they have to fill it to a certain degree by ejaculating into it.
However, that amount is far greater than you might expect.
Especially since many of the men who come in have performance issues.
It is said that in some rare cases, a clinic will have a special nurse whose specialty is extraction of semen.

You visit a clinic to check your infertility.
For the checkup, you are asked to fill a very large cup with your semen.
In an individual room, you rub yourself hard. Then, a sultry nurse comes in.

Name: Chiha Rokuhato
Profession: Nurse (in charge of semen collection)

"Go buy me lunch at the bakery!” She yelled at her classmate. Sheepishly he agreed but said she was being a bit harsh and his classmate agreed. Little did everyone know that this was just an excuse for them to meet up in the bathroom for extracuricular activities and so that he would stop masturbating in the classroom. My girlfriend has a sweet tooth and after she has her fill she tries to use me as a tool to burn off calories by having sex. I’m starting to get a little worn out from the constant daily sessions.

Based on a game by Guilty.

Kaoru is a high school student. He has an old friend, Nanao, at the same school. She has been giving him sexually insulting orders in front of other students and he has always obeyed it. But one day, his patience runs out and decides to take revenge on her. While he still plans how to do it, he accidentally witnesses Mayu, his classmate, shoplifting. He makes up his mind to use Mayu as his pawn.

When you've been abused all of your school life and finally some way of fighting back finds its way into your hands, what would you do? Would you use it to get revenge on all the girls at your school, including your childhood best friend who shunned and shamed you? Use their bodies for your every desire?

Tomohisa and Endou aren't either so handsome or ugly; they are just normal boy students. They're looking at Mizuho, the senior student, and Mikura, their classmate. Mizuho is a returnee student, and she attracts all the students by her beauty. Mizuho notices their eyes, and she gives Tomohisa a suggestive look. One day, Tomohisa finds a note in his desk. It says, "I'm waiting in the ladies' room on the third floor". He goes there and finds Mizuho is waiting for him... The next day, Tomohisa can't help recalling the event the day before. He happens to find that Endou is gone, and also Mikura, whom he loves secretly, is missing, too. He's afraid that they're doing things. However, exactly, they're doing things on the fire escape.

The story centers on high school student Kaga Michio. Wandering aimlessly through life and the Internet, he finds himself transported from a shady website to a fantasy world — reborn as a strong man who can use "cheat" powers. He uses his powers to become an adventurer, earn money, and get the right to claim girls that have idol-level beauty to form his very own harem.

Shuji lives a peaceful life with his younger sister, Saki. But he secretly loves her and his libido gets uncontrollable day by day. One day, Saki tells him, "I love you.... I've been always thinking about you since I was a kid...." Like this, they become boyfriend/girlfriend. However, their happiness is destroyed by an email. "I know your everything...." The email attaches a photo of Saki changing clothes and masturbating. Saki thinks her stalker did it. The stalker gives her various immoral orders. She first tries to resist it, but she gradually gets addicted to it.... Well, will Shuji be able to save Saki...?

A horrible murder has been committed on the grounds of Nankai Academy. Professor Yuko, one of the school's most popular teachers, died when she was pushed off of the roof of one of the school's buildings. Her death has left her students with feelings of confusion, pain, and above all else... anger. Four of her male students, Masayoshi, Daisuke, Mitsuru and Shinya, are determined to uncover the truth. They soon discover an important clue: Professor Yuko's planner had been marked on the very night she was killed... marked with the names of seven girls.

With this evidence, the boys begin their investigations... and they'll use any method required in order to find the murderer. Through rape, manipulation and torture, they uncover important details, but piecing the puzzle together won't be easy. And the longer their search draws on, the more they feel themselves being overtaken by their own dark desires... Will they ever find out the truth behind Yuko's death?

Saimin Class: Joshi Zenin, Shiranai Uchi ni Ninshin Shitemashita Adaptation from the visual novel of the same name.

Based on the game by Tinker Bell.

Within a western-style mansion located deep in the hills, an obscene ritual is taking place. Hongou Yukino is being trained as the new shrine maiden via harsh and shameful methods. Trapped as she is, all she can do is silently pray for deliverance.

One day, an investigator by the name of Mibu Kyousuke happens upon the mansion...

I couldn't stand the lewd provocations of my boyish childhood friend Satonaka Satsuki, who has a cheeky style, so I got her alone in a room with me and decided to take my revenge!

The days of sex galore with the best female slut after school begins!

When his mother dies and his father remarries, Kaito takes a shine to his sexy new stepmother, Sayoko. Driven mad with lust, Kaito is soon spying on her and sneaking into her bedroom for some covert late-night action. Though racked with guilt, Sayoko eventually finds herself a willing participant. And when Kaito tells her that his father is cheating on her with a younger woman, theirs becomes a full-fledged affair. The sex, sin and betrayal will turn Kaito's whole household upside down!

Sex with your childhood Final Fantasy girl.. check.

Dodge lawsuit from Square by changing a character in her name.. check, and check.

"Yufin" the self-proclaimed treasure hunter in 3.5 erotic episodes.

A boy with an absolutely insanely overactive sex drive puts all of his energy into his "special book". He accidentally left it behind in a classroom one day and to his surprise one of his classmates was touching herself while looking at it!

That happened a bit ago, now he is in a full on harem lifestyle with more girls throwing themselves at him than he can keep up with!

Futoshi Satō, a high school teacher, is ugly and despised by students and female teachers alike. A powerful device falls in his hands—a mysterious cell phone with which he can induce an hypnotic state in whomever he takes a photo of. During that state he can modify the subject's will and body response the way he likes, so it is fun time for this teacher, and he aims as high as he can—the head teacher and the members of the student council.

While being a regular part of beach volleyball, Kiryu Saori was not able to show her ability in the game because of stage fright. In order to overcome it,she starts with special intensive training with her coach. Special training and H will start in the name of stamina.

An OVA based on the WAFFLE game.

The story follows Ryuuto Hende, a soldier with unbelievable luck who was assigned to the province where a succubus is drying out men to death, and the local "first lady", who happens to be sexually frustrated. The H-parts show mostly a big-breasts theme and mutual love/appreciation.

I want to be an idol, but I like him... Minami, who is active as a singer for children, and Shoji, a single father with whom she started dating. They are secretly an item even though she is a children's idol... they feel the joy of being in love as a man and woman when they are alone together. However, as they continue their secret relationship, scandalous attention is finally drawn to them!? The second season of their love story has begun!

A student gets his hands on a device that allows him to modify the will of any targeted female - he can bring out the lust and any hidden feeling from their minds and use it to his advantage. He attacks many of his classmates with this new power.

Valkyrie Choukyou Semen Tank no Ikusa Otome 10-nin Shimai

Based on "Valkyrie Chōkyō Semen Tank no Ikusa Otome 10-nin Shimai" (erotic game) by MBS Truth.

The Valkyrie are charged with maintaining peace between the realm of gods, the realm of humans and the realm of the dead. The peace has started to breakdown and one of the Valkyrie has been possessed by a vengeful force.