Two years into his job at a camera manufacturer, a young employee takes a day trip with his slightly older supervisor, Mio. Beautiful, capable, and admired by everyone, she is his ideal woman, though her marriage makes his feelings impossible to pursue. Their time alone already has his heart racing, but when a client deal falls through, they must stay overnight, redo the materials, and return the next day. With only one room available at a business hotel, he unexpectedly finds himself spending the night alone with the married boss he has always desired.