Based on the erotic game by Grand Cru.

Rie is a new teacher, but she already gets along with her students, especially one boy, Yuuji. Not only have the two of them been going out, they have been having sex all over the place, even to the point of almost getting caught by the janitor. However, this relationship is not socially acceptable, and this weighs heavily on Rie, more so since her friend keeps nagging her to break it off. And yet, the couple's love for each other is strong. Nevertheless, too much of anything is a bad thing, and as Rie's love and lust for Yuuji continues to soar, will their relationship remain strong?