Under the Carp Banner (1992) aka Chikan Waisetsu Nozoki

A bored and rebellious couple opt to steal a car and head to the countryside to visit some relatives, among whom is an adolescent boy who suffered brain damage as a child. After a brief visit filled with hot tubs and sex, the couple heads back to Tokyo, bringing with them the boy with the intent of showing him the big city and broadening his exposure to the real world. But the boy’s visit is quickly filled with inedible fast food, sex and drugs, all of which send him into a moral spiral which soon has him yearning for a thorough purge of Japanese society. Taking things into his own hands in his desire to rid Japan of corrupting influences, he embarks upon a crazed blood-letting which eventually leads him back to his home town.

YEAR...............: 1992
DIRECTOR...........: Kazuhiro Sano
STARS..............: Akiko Tomonari, Kazuhiro Sano, Kanako Kishi
GENRES.............: Drama | Erotic | Pinku
COUNTRY............: Japan 
LANGUAGE...........: Japanese
SUBTITLES..........: English
IMDB LINK..........: http://www.imdb.com/title/tt0291079/
ALSO KNOWN AS......: Chikan Waisetsu Nozoki
FORMAT.............: DVDrip | 600 MiB | 61mins | 775x422 | mkv

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