Office Lady's Damp Pantyhose Mami, who works at a property management company, is dating her colleague Nagaoka. With marriage in mind, they were about to move in together and were living happily every day... Meanwhile, Sugiura, an incompetent senior colleague who secretly harbored feelings for Mami, felt betrayed by her and harbored resentment. He then pounced on Mami while she was working late one night.