Natsumushi The Animation

The story starts with a man confessing to his habit of molesting girls he find interesting. His new target is a young school girl named Tomoe. On the train, he pretends to have lost his balance and bumps into her then proceeds to check her for broken bones. We then have Rina, a bored student who has a hobby of groping men on the train. One fine day, her “victims” decide it's time to unite and she becomes the center of their attention. Despite the abuse done to her, she finds herself getting aroused...

Tomoe can’t bring herself to tell the man off. He knows this very well and decides to take her out – and into a public toilet. He teases her with a vibrator and she wets herself in the process. A flashback explains how this stranger became a molester. During one of his rides on the train he too was groped. However, he wasn’t able to do much in return. Back in the present, Tomoe is still being abused. Later, she finds herself getting back on the same train as the man...