"Groper Train" pink film distributed by Okura Eiga. Mukai, an employee of Tozai Construction, is having his crotch groped by a woman on a packed train. Overwhelmed by her technique, he instinctively reaches for her private parts, but at that moment, his hand is seized and he is handed over to the police. Two more similar incidents follow. A certain suspicion arises regarding this string of arrests involving Tozai Construction employees...