Title: Snake Of June
Starring: Asuka Kurosawa, Yuji Koutari, Shinya Tsukamoto  
Director: Shinya Tsukamoto   
Studio: Happinet Pictures 
Genre: Drama 

Overview:
Shinya Tsukamoto's films have always focused on the family unit, or more precisely on the unity between couples. Most of the attention for his work has concentrated somewhat disproportionately on the sci-fi / cyberpunk elements, the theme of bodily mutation and the similarities with the work of Davids Cronenberg and Lynch. Although these are certainly major factors, at heart Tsukamoto's films consistently deal with relationships and the influences that threaten them.

Rarely was this more apparent than in A Snake of June, which recycles the love triangle premise of his earlier films Gemini and Tokyo Fist, but dispenses with the horror/fantasy overtones of the former and the bloodspurting brutality of the latter. This is the story of a couple first and foremost, not a genre film that happens to have a couple as its subject.

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.

taken from http://www.dvdasian.com/cgi-bin/dvdasian/16819.html?id=6LV8sUIB

IMO:
this is one of the artistic movies made by this guy... the way they present it is nice, starting from the wife's side, then next chapter is the husband, and the final is the wife, husband n the blackmailer... every scene is in black n white n raining always... they oso feature the lovely snail sometimes and as well as the big hole on the ceiling where the bathtub lies... to let ppl see u soaking in the water or to relax i duno...