Studentinnen-Report (1978)

Three pretty young blonde students are spending the summer in a villa near Athens, Greece, studying the area. The villa's owner, who is the father of one of the girls, sends his private detective, Fred, to keep on eye on them. Fred finds out that the girls are all having flings with the local boys, and determines to send his employer's daughter back to him. However, the villa's horny housekeeper has her eye on Fred and sets out to convince him otherwise.