オフィス妻のさけび (1985)

Natsuko is witnessed carrying on an affair with her boss, Misawa, by the unmarried Chieko. However, Chieko dies by falling and is found about ten days later in the shrubbery in front of the company. It is revealed that Chieko led a flashy private life and frequented a host club. Moreover, it seems that she was having an affair with Division Chief Yamazaki.