Yuu Shinoda and her coworker are left behind at the office while everyone else goes on a company trip, as they both caught a cold. With the workplace empty, the two spend the day alone together. Unable to resist as her senior naps on the sofa, he suddenly makes his move. Her weak resistance and erotic charm captivate him completely, rapidly deepening their relationship. In the forbidden space of the office, forgetting their respective partners, they lose themselves in a passionate encounter meant for only the two of them.