Mōsō Taiiku Kyōshi: Bloomers no Suji wa Tōshite Moraimasu

This Japanese hentai visual novel tells the story of Yoshimi Kurosugi, a perverted teacher with a fetish for girls wearing athletic bloomers. Due to the fact that only female teachers are allowed to teach female students P.E. lessons, Yoshimi fears that he will never get close to a girl wearing bloomers—until one of the female P.E. teachers gets sick and he is called in as a last-minute replacement. Yoshimi immediately preys on the underachieving Orie Futami, roping her into private lessons where he begins to molest her under the pretense of teaching her. Eventually, Orie's friend and classmate, Reika Akasaka, is drawn into their lessons too.