Kuroda and Shimamura get trapped in a classroom and everything gets worse when they see two of their teachers are having sex.

"I see you've come again." Every time she comes to this storage room, it always happens. This guy is waiting for her...waiting for him to teach her body all about pleasure. ------------------ The third stor...

The class disciplinary head Minori becomes beholden to the pleasure of raw sex with her classmate Ooba, all the while fearing unwanted pregnancy. (Source: DLsite)