An erotic manga set in a world where practical sex lessons have been incorporated into compulsory education as a countermeasure to the falling birthrate. The protagonist has lots and lots of sex with his classmates and the sex-ed teacher.
Succubi luck in an academy and students disappear one by one... Let's drive the succubi all out of the academy with agents' help! A titjob-specialized novel work with story branches!
There's a reason everyone goes to the library after school, and it's not to read. It's the sex club! A follow-up to "Please!Freeze!Please!", with the ever pure Hayaka joining the mix. Sexual doors will be opened!
A guy who died from a failed peeping incident has lingering regrets and remains in this world as a ghost, unnoticed by others. He takes this chance to have his way with all the girls in the school, and fill them with his cream.