Seika Girl’s Private Academy has a dark secret. All of the girls at this school are from prestigious families and thus have never dated… even once. So the school had to come up with a way to make sure they didn’t get too overwhelmed by their urges..

Every school has secrets, but few leave a stain that won’t wash out. In a certain school, there was once a fun club centered around magic but had turned into murder and a lust for power. Sealed and willfully forgotten, the resulting evil of that day remained chained in the school’s basement. Twelve years later, high school student Taki Minase, while inspecting the place where the incident took place, uncloaks the secret plastered in blood—a book of magic called “Black Bible.” Trying his luck with its love curses, he soon finds out the magic proves real and easily penetrates the hearts and bodies of his fellow classmates. The resulting intercourse leaves the student body very vocal, and Minase’s acts do not go unnoticed. What was at first a simple stroke of curiosity becomes much larger and harder to control. Fully swallowed by the unshackled darkness, everyone he knows becomes a victim, including his childhood friend Kurumi Imari. Torn apart, Minase finally realizes his mistakes and that he must reverse them in time if he ever hopes for him and Imari to come together.

Ryouichi goes to his friend Yuu’s place to play video games, like they do sometimes. It turns out that Yuu’s aunt Yui has come to visit, and she joins them. But it soon becomes clear that it’s not a video game she wants to play with Ryouichi…

Ichirou Tani loves hostess bars and spends the lion’s share of his salary on them. One day, he was so drunk that he spent all the money of the company he worked for on girls. Ichirou decided to escape to the mountains. His car broke down during a heavy snowstorm, and he was forced to walk blindly and seek help. He soon found salvation in the Ishikan Inn. There, Ichirou met the widowed mistress Ryuri Munakata, her daughter Nakoto, and the lovely maid Ren. He did not change his habits and decided at all costs to subdue these sexy beauties…

High school dude starts dating this rich girl, but she ain’t really feeling it. She needs a real man. Someone who’ll spank her ass and make her say daddy. You know how this is going to end. *moment of silence for our fallen comrade*

A baseball team manager will do anything to help and protect her teammate boyfriend, including taking sex education classes with her coach.