Shôwa no onna: Danchi ni sumu hitozumatachi

昭和の女　団地に棲む人妻たち

Also known as 昭和の女　立ちんぼ妻の性癖

On the way home after being embraced by a man in a grove, an elderly gentleman named Akio calls out to her, but Keiko, who doesn't want to miss the last train, turns him down. That night, Hideki and Keiko get into an argument over something trivial, and Keiko is slapped in the face...