Based on the adult game by Guilty.

The endless battle for sexual conquest… who will win? The sister with an anal fetish or the perverted girlfriend?

Yuuichi Mamiya uses a penlight’s powerful hypnotic properties on his loving mother-in-law and younger sisters-in-law, amplifying their sexual desire. However news of the things that happen in the Mamiya household starts making trouble in the neighborhood. The president of the neighborhood association comes to talk with the Mamiyas, but she soon falls to Yuuichi’s hypnosis. Rumors about the Mamiya household spread throughout town, and Yuuichi is forced to take drastic measures.

Based on the manga by Komiya Sanae and Nonomura Hideki.
Dr. Narutaki, a genius who is trying to preserve true Japanese men, not the losers they are today, needs semen from 100 specimens. The problem is these 100 specimens wouldn’t give it to him voluntarily, so he comes up with a plan. He gets Marin, a sexy girl from an all girl school, and puts her into a special costume that transforms to a mans desire and won’t come off until she gets all 100 semen samples. However, Southpole One, a sexaroid created by the doctor’s assistant, is interfering by exhausting and taking the men’s semen first, making it a race.
“For the bright future of Japan, I shall take your semen!”

Based on the manga by Kurogane Ken.
Shinobu Handa and Momoko Naitou know each other since childhood.
Shinobu fell in love with Momoko from the day they first met. Now
in High School, Momoko has forgotten about the past, but Shinobu
hasn’t. Both follow their own paths but Shinbobu still hopes for
Momoko to remember the promise they made long ago.

It began centuries ago, when the Miroku ninja clan made a deal with the forces of the underworld, leading to centuries of struggle between rival clans. And now, after more than 600 years of peace, the denizens of the underworld are about to get a new boss.
Now, 18-year-old ninja in training Midou Miko is entrusted with the family business: making sure that sex-starved demons stay out of humanity’s way! What does a ninja do? Fight, with every battle skill and sexual sorcery she can muster!

“What the fuck is this…!”
In front of me is laid out, like a public execution, a dirty magazine and porn films… not to mention SM type stuff. Bondage and spanking, mouth gags and the sort… Wait, why SM!? In front of me is Saki, my student and my girlfriend. I thought she was going to hit me, but she sticks a towel in front of my face. A towel in place of a fist… I get excited at what is going to happen to me as she scowls at me. She then falls onto to the bed.
“Hurry up and do it… Tie me up with that towel…!”
… What? Uh… what? WHAT?? Saki suddenly gets into a position as she orders me, her face all red.
“You want to do stuff like this don’t you!? Then ti-tie me up and fuck me then…!!”

Based on the erotic game by Undermoon.
Saionji is a lazy employee who always gets scolded by his boss. One day, he was asked to test the effectiveness of an aphrodisiac on the female employees of his company.