Momonogi-san is a new employee who loves older men. She is assigned to a department where her department chief, Ozawa, is her perfect match. Despite her cute face, she clings to Ozawa, whispers to him, and seduces him. Ozawa, who has a wife and children, continues to resist the temptations of his subordinates, but on the fifth day, Friday night, he gives in and has sex with them. From that day on, an escalating erotic theater between the new girl and the older man begins.