Erotic sex or dangerous fantasy?
A submissive hooker goes about her trade, suffering abuse at the hands of Japanese salarymen and Yakuza types. She's unhappy about her work, and is apparently trying to find some sort of appeasement for the fact that her lover has married.
In Tokyo, the hooker Ai works in an escort agency specialized in perversions and kinky sex. Ai is submissive to her clients and accepts to be humiliated, to perform sadomasochism and bondage and threesome. However she is unhappy with her life for some reason.