Boss Sagawa and new graduate employee Shiina head to an inn to stay after a business trip, but run into trouble as only one room is booked. - However, that was a deliberate arrangement by Shiina, who likes old men, so that she could stay in the same room as Sagawa. - Shiina seduces Sagawa and ends up having an affair with him. - Although Sagawa feels guilty, he gets carried away and becomes addicted to it...