Shinnin jokyôshi: Bijutsu-shitsu no jôji (1996)

Tatsuya, a student of newly appointed teacher Yuko, has a girlfriend named Miki, but spends the night in Yuko's room. When Miki finds out, she records all of Yuko's lewd behavior on video camera and blackmails her, making Yuko her puppet. One night, Tatsuya is invited to an orgy party hosted by Miki...