Prim and serious math teacher Kimura Aimi has never even experienced an orgasm—until a lecherous coworker fingers her on a packed train and gives her the first climax of her life. After secretly masturbating in the library, she fully awakens to her desires and begs the groper for more, even inviting him to a love hotel herself. Her huge tits bounce as she tangles her pantyhose-clad legs around him, squirts hard, and finally takes a facial. The thrill of being groped transforms the once-reserved teacher into a shamelessly horny woman.