Kazuki Okino is an ordinary student who enjoys a quiet life. There are two important girls in his life: his sister Rinka and his childhood friend Otome Sakuragi. Otome is a year older than Kazuki, she is beautiful and attractive to many guys at school. Although Kazuki and Otome are not a couple, they spend a lot of time together and get along great.

Hentai is a collection of different stories. The first of them is about the unusual love of Yuichi-kun and the mistress of his house. The second is about an adult game between a brother and sister and about school productions.

In the not too distant future, the male birth rate has plummeted, putting humanity at risk of extinction. To prevent a catastrophe, a law was passed on a "license for free sex." The holder of such a license had the right to enter into intimate relations with any woman at will, and the woman could not refuse him.

This is the story of a knight who lived in an era when knights fought on the battlefields and protected people from the dark forces. One day, a young knight was sent to a small village to protect the locals from the dangers that could come from both the human world and demons.

The main character of the anime is Tamao-kun, an ordinary student. He is modest and short, but secretly admires the local school star, Kiritani Kome, the captain of the kendo club.

Kaito is an ambitious young man who was born in a small town and grew up in a simple family. Since childhood, he dreamed of fame and fortune, wanted to get rid of poverty and live in abundance. Realizing that there were no opportunities in his hometown to achieve these goals, Kaito decided to move to a modern metropolis. Here he was greeted by a new world: tall buildings, bright signs, luxury cars and beautiful girls on the streets.

Sawatori Yukito had been looking for a job for a long time and one day saw an ad in the newspaper. It talked about a good reward for his work, and the guy decided to take a chance. He contacted his employer and agreed to become a servant in the same household.

In this fascinating story, a character named Takashima Shigura appears, who is known for her exceptional academic success and hard work. She is appreciated not only by her teachers, but also by her classmates.

Amidahara city, which is known for its not very pious reputation, where it is better not to go out into the streets without weapons, is home to many dark personalities, both among humans and demons.

The younger sister discreetly watches her brother as he plays with his older sister's underwear. The brother, in turn, enjoys the view of his sleeping sister, who lies in a provocative pose.

There is a contradiction with believers in a medical organization. They break the taboos to study the human body. An experiment on manipulating human consciousness is planned in one of the medical centers.

We learned the story of a young man who tries to win the heart of the only girl, but without success. Over time, he realizes that suffering from unrequited love for one lady is not so exciting, especially when there are so many beautiful and attractive girlfriends around who don't mind his attention at all.

Three goddesses known as Valkyries are languishing in the arrogant duke's dungeon: Leia, Alia and Hildegarde. They were captured by the demonic army and are now constantly being abused. Their will and mind are broken, and they have become slaves of pleasure.

The story is about Koji, who lives next door to a girl he was friends with as a child, and now they have a romantic relationship. Every day he comes to visit her to satisfy his needs. However, he does not have deep feelings for her, she is just a partner for an intimate relationship for him.

During the summer holidays, a student named Katsuragi, at the request of his late grandfather, got a job with a young lady Tsubareta as a butler. There he met Tsubareta the Cat. She was charming, and he couldn't help but pay attention to her.

Hentai is based on the manga by Osuzu Akiomi. The first part tells about the forbidden love between a brother named Anya and his younger sister Kasumi.

One evening, Seiichi went out onto the balcony to find inspiration for his new romantic work. He decided to get some air and look at the night city. Suddenly, he noticed that something strange was happening on the next balcony behind a thin wall. There was Maki, his classmate, whom he considered a sweet, kind and intelligent girl. She was doing something that was completely unacceptable to him.

The story of a rich girl from high society. She has money and a fancy house, but she has no sexual experience at all, and therefore they make fun of her.

When she was in high school, she liked two guys. And so, when the girl grew up, she met them in her life. Now, in order to choose one of them, she needs to communicate with both of them. Of course, she can't tell them about her love triangle.

The ferocious virus continues to rage, and a young guy is trying to save his sister and girlfriend. Whether he succeeds, we will find out from this issue. And wouldn't he have to sleep with his own sister?