Chikan densha: Hentai urawazashi (1991)

Sinopsis

An old man who is a scissor enthusiast indulges in the perverted act of cutting panties every day on the train. Yoriko, an office worker who fell prey to the molester, prepared a powerful magnet and boarded a crowded train the next day to catch him. Part of the long-running "Groper Train" series.