Shameless School: Health Check in the Nude (1970)

"Co-eds at a high school wreak havoc when doctors comes to give them a health check in the nude."

In this outing of Harenchi Gakuen the students undergo a health check after school, but all is not what it seems. Teacher 'Beard Godzilla' has kicked out the infirmary's doctor and taken his place. A trio of students notice the trick and dress up as medical professionals to assist the female portion of the school body. A newspaper has caught wind of this.