Endless Lust: Make Me Squirm! (2000)

Junichi is a drug dealer who has no place in society and wanders the streets. The only thing that makes him feel alive is running and sex. Kumiko is raped by the misanthropic Junichi, but for some reason she is attracted to him and falls in love with him. However, after being chased by the detectives, Junichi disappears from Kumiko's life and starts working at a factory in the town where she washed up...