Groper Train: When We Come, Together (1990)

Original title: 痴漢電車 イクとき、いっしょ

The company president loves molesting women on trains. He ends up secretly creating a molestation room in the company, with two hanging straps hanging from the ceiling and a sound system that plays the rumbling sound of trains with a realistic quality. He gives a special allowance to two office ladies who are financially struggling among the employees, and makes them secretaries for the molestation room. Eventually, the two of them conspire to come up with a plan to make the president take his breath away and get out of this life...