One day, Eriko, a married woman full of a sense of justice, encounters a filthy ●. Normally, I would throw my hand away right away, but on that day, I was unknowingly swept away by the dirty tricks of the pervert, and I leaked my voice on the train. The unprecedented pleasure is deeply burned into Eriko's mind. While ostensibly I hated molestation, somewhere in my heart, I was expecting the pleasure of being played with in front of the public. And then, a man sneaks up behind Eriko again...