Eros School Feels So Good (1977)
A shady male student transfers into a high school full of nubile young schoolgirls. He has his way with most of the female student body on his way to his real conquest–the sexy athletic star and class president, who is still a virgin. However, another male student–who is in love with the object of his rival’s desire and also wants to take her virginity–hatches a plan of his own to take revenge upon his rival.