Molester and the Peeper : Athletic Women's Dormitory (1992)

Sinopsis

A senior athlete (Yasuha) who is addicted to lesbianism and her junior (Yukino Tsukioka) are forced to bring in a peeping man under the orders of forbidden sex from a demon coach (Yuna Ei) who secretly indulges in public sex! At this point, the peeping professional threatens to reveal the secret of the demon coach and relaxes the dormitory rules with F*CK. An exciting work about the eroticism of the vertical society of athletic girls