Watching a film that is older than myself is, to my surprise, quite refreshing. Odd Obsession (1959) by Kon Ichikawa has stood the test of time, and thanks to TGHFF's Salute to Masters Programme, I can now mark the film as watched.
Odd Obsession is an adaption of Jun'ichirō Tanizaki's controversial novel of the same name. The original name in Janpanese, Kagi, means keys that open things. In the novel, the keys that open diaries kept by a husband and his wife were not carefully guarded. They left the keys knowingly to each other so one's diary could be read by the other. The content of the diaries is the central theme of book: sexuality. The husband's sexual ability was declining, and the wife's dissatisfaction was at the same time growing. They responded to this problem with a plot involving their daughter and daughter's fiancée.
From what I read, the film has chosen a different way to end the story--a way that to some might be too dramatic but to me an ingenious twist.

Read also:

• Strictly Film School: Kon Ichikawa's Kagi