A page called "Showa sex crime" was opened .... Mika Matsushita's husband runs a piston manufacturing factory as a subcontractor for an automobile manufacturer. Around the end of the 40s of the Showa era, her husband suddenly died of a myocardial infarction. There were 78 workers, but her wife Mika decided to close the business. Five years have passed since the factory was closed, and misfortune began for Mika and Reiko, who lived with her sister and her husband in the residential area of the factory.
