On a business trip with her balding, obnoxious older boss, Nana is caught in a sudden torrential downpour and forced to share a room with him. Her clothes are soaked until her underwear shows through, exposing a tight young-adult body that brings out his predatory side. He licks her all over and rapes her, then relentlessly abuses her intimate areas until she cums repeatedly despite resisting. Trapped alone with the sexually insatiable man, she is assaulted all night, her pussy constantly soaked with pleasure. Though her boyfriend is waiting at home, the prolonged, degrading conditioning begins to conquer even her heart.