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.
Kuragano is a plain girl that's always studied at the same school as me. Truth be told, we have a secret relationship where she lets me fondle her breasts. While I may not be her boyfriend or anything, I don't want her to be taken by anyone...
Ayase, the strict head of the disciplinary committee, falls into a rather immoral sex life after accepting a "just once" sex proposition from her boyfriend.
Miyano is a mean girl that makes me do all of her work, but... as "reward" for doing so... she lets me touch her titties! She's always making fun of me... so I don't understand what kind of game she's playing...?
In Japan in the near future, Japan faces a serious drop in population due to Japanese men's lack of libido and limp dicks. The strongest dicks are given free rein to inseminate whoever they want.
20XX... Anytime, anywhere, reproductive sex is now allowed! However, for some reason Maria isn't popular with the guys...? One day, a male student asks her for sex, and thus begins this busty gal's super duper sexy tale of turning her life around!