Based on the manga by Yuzuki N’.

Everyone views the student council president as the perfect girl, but what they don’t know is that her favorite thing is fellatio with her younger brother. With their parents always traveling they fulfill this desire quite often and in various ways.

The Hungry Bear is a restaurant where carnal appetites are satisfied to order. The waitress, Mika, has just uncovered the secret life of her late sister, a woman who would perform any sexual act, no matter how bizarre! But the secret’s all in the sauce, and Mika vows to service her clientele’s insatiable appetite for the exotic!

Hikari is an ordinary school student. One day she meets Buccha the talking cat, who says that she’s Venus Pink, warrior of the goddess Aphrodite. Along with four other girls she has to fight with perverted Necros and four lords of Inma Empire, who want to revive the god of lust, Apollo, and turn the world into a sex pit.

Based on original work by Kino Hitoshi.
Arisa and Mika Nanase are sisters and the school super-idols. They are the hottest and cutest girls in the school. Sousuke is a normal student who like the rest of the boys, can only look at the super-idol sisters from afar. Sousuke likes Arisa but can never hope to even speak with her. One day Mika tells him she want to speak with him after school. Later, he meets with Mika and Arisa and they reveal that they have now become siblings! The truth is that Sousuke’s father, an adventurer, and the Nanase sister’s mother, an archeologist, met at an excavating ruin in South America, fell in love, and married.
Mika, Arisa, and Sousuke are now siblings and will live under the same roof from now on. Sousuke now has to be careful to not get caught masturbating by Mika or Arisa …or maybe they might just give him a helping hand… How about taking a bath with Mika? …Siblings do bathe together after all…

Our protagonist is a run-of-the-mill businessman in his late 20s with no girlfriend. There is a cute HS girl he sees on the train every day. She’s well developed, with nice hips, and a healthy figure. If only he could marry a woman like her…
With that figure and kind personality, she’s given up on struggling and gives into being molested or fucked. That is all she’s known.
One day our protagonist molested her on the train. When she didn’t struggle, he brought her to a hotel for sex. This would be the first time she has had normal sex. That’s when she learned how good sex can be, and he learned about her tight ass and voluptuous tits, her family-oriented and nice personality, and how she’s a dirty girl.
They fell in love with each other, and their sexapades escalated.

Yuuto has taken service in the Ijiyuuin household to atone for his father’s misdeeds. He works hard and catches the eye of Serena, the 2nd daughter of the family. Utilizing her voluptuous body, she entices Yuuto. However, Selena is actually a vampire, and her partners don’t live beyond one day.

After a tumultuous summer vacation, Shuuichi begins the second school term while under the constant love assault from Ai and Mio. One day the tennis club leader Reiko announced that they will participate in the school festival at the end of the month, which they decided to run a cosplay cafe after much wrangling. Afterwards, she decided that she wanted to run as a candidate for next term’s student council. That wasn’t the end of his tumultuous days as a transfer student suddenly appeared in his class…