Groper Train: Push When You Get On (1991)

Yamada is a regular employee. He is timid and is exposed to pressure from his superiors and subordinates, living in fear every day. His superiors even say that "a man who can't even commit a molestation will not get promoted." So he decides to "become a man today!" and commits a molestation, but the woman he molests turns out to be the daughter of a regular customer...