Joshidai-ryô: SEX Nozoki shokku (1985)

One day, Reiko, a female college student who aims to be active in the world of mass media, is asked to investigate the actual situation regarding sex among female college students. Reiko infiltrates the girls' dormitory, but as soon as she moves in, Kyoko, who manages her dormitory, forces her to attend a party on Saturday night...