Based on the erotic game by Astronauts: Sirius.

In a crowded train, swirling with desire, stands a man with his hood pulled down low: Kiichi Kusakabe. His eyes see through women's desire to be molested, and with his masterful finger techniques, he lures them into pleasure.

Episode 1: Fudou Iori-hen
Iori Fudou, a student at Reimeikan University, doubted the existence of molesters. "There's no way molesters exist. They're just an urban legend." While investigating their existence, she was molested and was saved by Kiichi, who was also a molester...

Episode 2: Houshou Rimika-hen
Rimika Houshou is popular for her erotic expose-type live streams. "I can't believe in molestation! I wish the scum of society would just disappear!" While boasting like this, she plans to do a live stream using molestation as a joke, but there she comes face to face with Kiichi...

(Source: showten, translated)