Molester's Train: Mischievous Fingers (1982)
Original title: 痴漢電車 いたずらな指
Molester's Train: Mischievous Fingers is a 1982 Japanese-language drama movie directed by Mamoru Watanabe, with a running time of 1h 1m. It stars Makoto Yoshino, Mariya Satsuki and Anri Megumi.
Two men get to know each other through their shared love of groping on the train, and fall into a bromance. They build a set that looks exactly like the train, and when they open a shop where people can come and play groper with their models inside of this set, it becomes very successful.