That day, Mutsu, a company executive, commuted by train for the first time in a while due to a mistake in arranging a hire car. He meets Nanae, a woman who is being molested. Mutsu tries to help her, but Nanae's gasping expression takes his breath away and he hesitates. Moreover, his hand was touching Nanae's butt, despite his own will. And Mutsu's train commute starts the next day?

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