Groper Train: Under Skirt (1986)

Original title: 痴漢電車 スカートの中

A girl who is always a maiden at heart is a big fan of a romantic poet from the Taisho era, and wants to buy a first edition of his poetry collection that she found in a used bookstore, but it is too expensive for her. She has no choice but to work part-time at a snack bar to save up the money. One day, a pink rainbow flies into her room, and at the same time as the shock, a strange man dressed in outdated clothes appears. The man is actually a poet and a big fan of her, a scientist, and has ended up lost in the present day due to a malfunction of the time machine he made, but of course she has no idea about it. The man is surprised at the transformation of Tokyo, but what is even more surprising is that the woman in front of him is the spitting image of his girlfriend from his original world...