Rapewoman: Dirty Sunday (1981)

Rapewoman: Dirty Sunday 1981 / レイプウーマン　淫らな日曜日 1981 /

Naoko is getting a lot of obscene phone calls, so she decides to stay at her girlfriend Mari's home for a while, afraid of a rape attack. But the telephone calls don't stop, and the mysterious pervert caller is bothering her there too. Naoko reluctantly agrees to meet him at a local restaurant, hoping the man will stop. When she arrives, Naoko is surprised to find the café is operated by Harada, a man whom she and Mari had liked so much in the past that, in fact, they had catfights over him at their working places. It was due to a love triangle scuffle that they had been both fired from their previous jobs. (Source: themoviedb)