A Snake of June on AllMovie

Shinya Tsukamoto's Rokugatsu No Hebi (A Snake of June) is an erotic drama abut a married couple. Rinko (Asuka Kurosawa) and her husband Shigehiko (Yuji Koutari) have seen their marriage become sexless, which frustrates Rinko. One day she receives a letter containing pictures of her pleasuring herself. The person who sends the letter calls her and reveals himself to be Igushi (Shinya Tsukamoto), a former psychiatric patient of Rinko's. Igushi begins to order Rinko to perform increasingly erotic acts. After Shigehiko finds one of Igushi's letters, the husband becomes involved in the mental games - with surprising results for their marriage. A Snake of June was screened at both the Venice Film Festival and the Toronto Film Festival.