Angel's Desire (1979)

How did two sisters from Tsugaru survive in the big city of Tokyo? The older sister passed the nursing exam and works at a major hospital in Tokyo. Meanwhile, the younger sister works as a menial laborer for a grimy obstetrician in a working-class neighborhood. The older sister, with a saintly face, works as a nurse, but in secret, she is consumed by carnal desires for men, while the younger sister, a naive and innocent country bumpkin, is trampled upon in the hell of adult lust... For some reason, these two contrasting sisters end up fighting over the same man... What will be the outcome of their fate?