Inga

Inga is a 1968 Swedish sexploitation film directed by Joseph W. Sarno. Later that year, Sarno also directed the sequel The Seduction of Inga. The musical soundtrack of the sequel was written and performed by Björn Ulvaeus and Benny Andersson, later of the Swedish pop group ABBA.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.