Confession of a Woman - Sachiko (1970)

Sachiko, a housewife with no problems, lives a happy life with her kind husband and her father-in-law, Teruaki. When her husband suddenly decides to go on a business trip, Sachiko and Teruaki have to spend time together, but for some reason Sachiko has a pensive look on her face. That night. Sachiko decides to do something and reveals her secret desire to Teruaki.