And so those strange creatures took the world by storm. Humans are being hunted and turned into zombies or used as hosts for parasitic tentacle organisms. As the global epidemic throws the world into panic, Houichi, his close friends, and teachers barricade themselves inside the school.
However, the creatures gradually make their way into the campus and start attacking the survivors. Those who are attacked surrender themselves to pleasure and begin to turn…

It’s a new century and men have lost their sexual desires thus decreasing the number of marriages and births. In order to repopulate the world, the government decided to start a program to improve men’s sex lives. Sex idols, girls who can sing, dance, and have sex with innumerable men, are now in need to help improve the stagnant society.

Mizuho stays after school to teach some students some equations, but that is not all there is to it. She also invites her boyfriend, Tomohisa, for some excitement. While giving those students the lesson, she is also giving Tomohisa a handjob; she even goes as far as to giving him a blowjob right then and there.
After all that hot action going on, Mizuho invites Tomohisa to her house to continue their good time together…

This is a story about a high-school girl named Emi, who fell in love with her younger step-brother. Finally, on her eighteenth birthday, she decides to tell him about her feelings. But suddenly, debt collectors arrive and confiscate everything your father possessed. Tomomi, Emi’s step-brother, disappears. Now Emi must find him, her only true love, and to confess to him her feelings.
But on her journey, Emi discovers a different personality inside herself. This other person is called Amy. While the true Emi is a shy, modest girl, her Amy part cares mostly about one thing: to make real her wildest sexual fantasies…

After school Takabe has his first sexual intercourse in the nurse’s office with Hayase, his classmate. Although he is surprised by her attitude, he begins to like being her sexfriend more and more and proceeds to pursue other relationships while occasionally meeting Hayase for casual sex.

Twelve years prior to it’s discovery by Minase, the origins of the magic book with dark,sensuous powers is revealed. Initially owned by a female student, Takashiro, who, along with other curious students form the first magic club on campus. The club begins to use the erotic spells to carry out favors for fellow students, and vengeance. After underestimating the powers behind the book, Takashiro is taken out of the picture, as a new leader guides the club towards a darker course, one that will force school newcomer Kitami to make a dire choice.

Hanako made it through life without harming or wronging a single soul. In death she was innocent, this allowed her to stay on in the mortal world.. She fell in love with a teacher named Okuda, but their love was to be forbidden. With the help of her monster and ghost friends they used their magic to allow the two to be as one.

She does what she has to, to be able to provide for her family… even if it includes indulging this sick old man in his perversions…